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Zeitschriftenartikel zum Thema „Laser communication systems“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 5. März 2023

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1

Ke, Qiang. „Numerical Simulation of Chaotic Laser Secure Communication“. Advanced Materials Research 798-799 (September 2013): 570–73. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.570.

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Using the idea of drive-response synchronization, we discuss the principle, numerical simulation of chaotic laser communication. Compared to traditional communications systems, the chaotic laser communication system has a well-kept secret performance, but the chaos synchronization requirements are very strict.

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2

Pengyuan Chang, Pengyuan Chang, Tiantian Shi Tiantian Shi, Shengnan Zhang Shengnan Zhang, Haosen Shang Haosen Shang, Duo Pan Duo Pan und Jingbiao Chen Jingbiao Chen. „Faraday laser at Rb 1529 nm transition for optical communication systems“. Chinese Optics Letters 15, Nr. 12 (2017): 121401. http://dx.doi.org/10.3788/col201715.121401.

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3

Zeng Fengjiao, 曾凤娇, 杨康建 Yang Kangjian, 晏旭 Yan Xu, 赵孟孟 Zhao Mengmeng, 杨平 Yang Ping und 文良华 Wen Lianghua. „Research Progress on Underwater Laser Communication Systems“. Laser & Optoelectronics Progress 58, Nr. 3 (2021): 0300002–30000226. http://dx.doi.org/10.3788/lop202158.0300002.

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4

Cai, Chengkun, und Jian Wang. „Femtosecond Laser-Fabricated Photonic Chips for Optical Communications: A Review“. Micromachines 13, Nr. 4 (16.04.2022): 630. http://dx.doi.org/10.3390/mi13040630.

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Integrated optics, having the unique properties of small size, low loss, high integration, and high scalability, is attracting considerable attention and has found many applications in optical communications, fulfilling the requirements for the ever-growing information rate and complexity in modern optical communication systems. Femtosecond laser fabrication is an acknowledged technique for producing integrated photonic devices with unique features, such as three-dimensional fabrication geometry, rapid prototyping, and single-step fabrication. Thus, plenty of femtosecond laser-fabricated on-chip devices have been manufactured to realize various optical communication functions, such as laser generation, laser amplification, laser modulation, frequency conversion, multi-dimensional multiplexing, and photonic wire bonding. In this paper, we review some of the most relevant research progress in femtosecond laser-fabricated photonic chips for optical communications, which may break new ground in this area. First, the basic principle of femtosecond laser fabrication and different types of laser-inscribed waveguides are briefly introduced. The devices are organized into two categories: active devices and passive devices. In the former category, waveguide lasers, amplifiers, electric-optic modulators, and frequency converters are reviewed, while in the latter, polarization multiplexers, mode multiplexers, and fan-in/fan-out devices are discussed. Later, photonic wire bonding is also introduced. Finally, conclusions and prospects in this field are also discussed.

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5

Strakhov, S. Yu, A. V. Trilis und N. V. Sotnikova. „Specifics of transmitting telescopes for laser communication systems“. Journal of Optical Technology 88, Nr. 5 (01.05.2021): 264. http://dx.doi.org/10.1364/jot.88.000264.

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6

Giuliano, Giovanni, Leslie Laycock, Duncan Rowe und Anthony E. Kelly. „Solar rejection in laser based underwater communication systems“. Optics Express 25, Nr. 26 (20.12.2017): 33066. http://dx.doi.org/10.1364/oe.25.033066.

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7

Moatlhodi, Ogomoditse O., Nonofo M. J. Ditshego und Ravi Samikannu. „Vertical Cavity Surface Emitting Lasers as Sources for Optical Communication Systems: A Review“. Journal of Nano Research 65 (Dezember 2020): 51–96. http://dx.doi.org/10.4028/www.scientific.net/jnanor.65.51.

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Next generation integrated photonic circuits will be dominated by small footprint devices with lower power consumption, low threshold currentsand high efficiencies. Vertical Cavity Surface Emitting Lasers (VCSELs) having those attractive qualities has shown results to meet the next generation demands for optical communication sources. VCSELs applications are sensors, data com, optical communication, spectroscopy, printers, optical storage, laser displays, atomic optical clocks, laser radar, optical signal processing to name a few. This review centres around on the basic operation of semiconductor lasers, structure analysis of the devices and parameter optimisation for optical communication systems. This paper will provide comparisons on growth techniques and material selection and intends to give the best material realisation for nano optical sources that are up to date as used in optical communication systems. It also provides summarised improvements by other research groups in realisation of VCSELs looking at speeds, efficiency, temperature dependence and the device physical dimensions. Different semiconductor device growth methods, light emitting materials and VCSELs state of art are reviewed. Discussions and a comparisons on different methods used for realising VCSELs are also looked into in this paper.

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8

Niu, Shen, Yue Song, Ligong Zhang, Yongyi Chen, Lei Liang, Ye Wang, Li Qin et al. „Research Progress of Monolithic Integrated DFB Laser Arrays for Optical Communication“. Crystals 12, Nr. 7 (21.07.2022): 1006. http://dx.doi.org/10.3390/cryst12071006.

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Photonic integrated circuits (PICs) play a leading role in modern information and communications technology. Among the core devices in PICs is the distributed feedback (DFB) multi-wavelength semiconductor laser array. Multi-wavelength semiconductor laser arrays can be integrated on a single chip and have the advantages of high stability, good single-mode performance, and narrow line width. The wavelength tuning range has been expanded through the design of the DFB laser array, which is an ideal light source for wavelength-division multiplexing systems. The preparation of DFB laser arrays with a large number of channels, ease of mass production, and accurate emission wavelengths has become an important field of research. The connection methods of lasers in DFB laser arrays are introduced systematically and the current methods of manufacturing multi-wavelength DFB laser arrays covering the perspective of technical principles, technical advantages and disadvantages, main research progress, and research status are summarized.

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9

Dmytryszyn, Mark, Matthew Crook und Timothy Sands. „Preparing for Satellite Laser Uplinks and Downlinks“. Sci 2, Nr. 1 (18.03.2020): 16. http://dx.doi.org/10.3390/sci2010016.

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The use of Light Amplification by Stimulated Emission of Radiation (i.e., LASERs or lasers) by the U.S. Department of Defense is not new and includes laser weapons guidance, laser-aided measurements, even lasers as weapons (e.g., Airborne Laser). Lasers in support of telecommunications is also not new. The use of laser light in fiber optics shattered thoughts on communications bandwidth and throughput. Even the use of lasers in space is no longer new. Lasers are being used for satellite-to-satellite crosslinking. Laser communication can transmit orders-of-magnitude more data using orders-of-magnitude less power and can do so with minimal risk of exposure to the sending and receiving terminals. What is new is using lasers as the uplink and downlink between the terrestrial segment and the space segment of satellite systems. More so, the use of lasers to transmit and receive data between moving terrestrial segments (e.g., ships at sea, airplanes in flight) and geosynchronous satellites is burgeoning. This manuscript examines the technological maturation of employing lasers as the signal carrier for satellite communications linking terrestrial and space systems. The purpose of the manuscript is to develop key performance parameters (KPPs) to inform U.S. Department of Defense initial capabilities documents (ICDs) for near-future satellite acquisition and development. By appreciating the history and technological challenges of employing lasers rather than traditional radio frequency sources for satellite uplink and downlink signal carriers, this manuscript recommends ways for the U.S. Department of Defense to employ lasers to transmit and receive high bandwidth, large-throughput data from moving platforms that need to retain low probabilities of detection, intercept, and exploitation (e.g., carrier battle group transiting to a hostile area of operations, unmanned aerial vehicle collecting over adversary areas). The manuscript also intends to identify commercial sector early-adopter fields and those fields likely to adapt to laser employment for transmission and receipt.

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10

Laksono, Pranoto Budi. „A STUDY OF THE INFLUENCE OF 650 nm LASER INTERFERENCE ON VISIBLE LASER LIGHT COMMUNICATION SYSTEM“. TEKNOKOM 4, Nr. 2 (01.09.2021): 60–65. http://dx.doi.org/10.31943/teknokom.v4i2.66.

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Visible Laser Light Communication System (VLLC) is a wireless communication system, using laser as the medium. In the data transfer process, it is possible to have optical interference where 2 laser beams coincide with one point on the reflector. Research on the effect of laser source interference has been carried out by several researchers including mitigation actions to reduce its effects. This experiment uses 2 optical distance sensors that produce a laser with a wavelength of 650 nm with a power <=4.1 mW and with the direction of the laser beam both of them cross each other. To determine the effect of the interference of two laser beams when crossing the communication process in the visible light communication system, a reflector is used which can capture the two laser beams and the reflector can be shifted gradually so that a condition can be obtained where the two laser beams meet at one point. From the measurements made at the points after the laser beam crossing, the measurements at the point where the beam crossed, and the measurements at the points before the beam crossing, it was obtained data, at the exact point where the laser beam crossed the interference occurred, which is indicated by unstable output voltage of the two lasers, so that communication at the point of intersection is disrupted. However, if outside the point of contact both before and after the point of contact, interference and communication systems will not occur.

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11

VANWIGGEREN, GREGORY D., und RAJARSHI ROY. „CHAOTIC COMMUNICATION USING TIME-DELAYED OPTICAL SYSTEMS“. International Journal of Bifurcation and Chaos 09, Nr. 11 (November 1999): 2129–56. http://dx.doi.org/10.1142/s0218127499001565.

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We discuss experimental demonstrations of chaotic communication in several optical systems. In each, an erbium-doped fiber ring laser (EDFRL) produces chaotic fluctuations of light intensity onto which is modulated a message consisting of a sequence of pseudorandom digital bits. This combination of chaos and message propagates at a wavelength of ~ 1.5 microns through standard single-mode optical fiber from the transmitter to a receiver, where the message is recovered from the chaos. We present evidence of the high-dimensional nature of the chaotic waveforms and demonstrate chaotic communications through 35 km of single-mode optical fiber at up to 250 Mbit/s, a rate that is, at present, limited only by the speed of our detector electronics.

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12

Fuhr, P. L. „Laser Diode Polarization Beam Combiners In Optical Communication Systems“. Optical Engineering 25, Nr. 2 (01.02.1986): 252309. http://dx.doi.org/10.1117/12.7973821.

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13

Jacob, J. M., E. A. Golovchenko und G. M. Carter. „Phase modulated pulsed laser for WDM soliton communication systems“. Electronics Letters 33, Nr. 6 (1997): 515. http://dx.doi.org/10.1049/el:19970292.

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14

Baskakova, A. V., S. N. Kuznetsov und S. E. Shirobakin. „Design of athermal optical systems for wireless laser communication“. Lasers. Measurements. Information 2, Nr. 3 (2022): 9–19. http://dx.doi.org/10.51639/2713-0568_2022_2_3_9.

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15

Hu, Hao, und Leif K. Oxenløwe. „Chip-based optical frequency combs for high-capacity optical communications“. Nanophotonics 10, Nr. 5 (03.02.2021): 1367–85. http://dx.doi.org/10.1515/nanoph-2020-0561.

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AbstractCurrent fibre optic communication systems owe their high-capacity abilities to the wavelength-division multiplexing (WDM) technique, which combines data channels running on different wavelengths, and most often requires many individual lasers. Optical frequency combs, with equally spaced coherent comb lines derived from a single source, have recently emerged as a potential substitute for parallel lasers in WDM systems. Benefits include the stable spacing and broadband phase coherence of the comb lines, enabling improved spectral efficiency of transmission systems, as well as potential energy savings in the WDM transmitters. In this paper, we discuss the requirements to a frequency comb for use in a high-capacity optical communication system in terms of optical linewidth, per comb line power and optical carrier-to-noise ratio, and look at the scaling of a comb source for ultra-high capacity systems. Then, we review the latest advances of various chip-based optical frequency comb generation schemes and their applications in optical communications, including mode-locked laser combs, spectral broadening of frequency combs, microresonator-based Kerr frequency combs and electro-optic frequency combs.

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16

Bielawski, Radosław, und Aleksandra Radomska. „NASA Space Laser Communications System“. Safety & Defense 6, Nr. 2 (02.11.2020): 51–62. http://dx.doi.org/10.37105/sd.85.

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Bidirectional space communication is a fundamental prerequisite for maintaining contact with objects performing missions in space, whether manned and unmanned. Until recently, it relied solely on the propagation of electromagnetic waves (the radio) using frequency bands dedicated for objects outside the Earth's atmosphere. However, modern space technologies are subject to ongoing development as they are being fitted with advanced communication systems. Given the constant enhancement of our technological capabilities, the traditional radio-based communication shows a glaring inadequacy and contributes to the widening of a gap between this and the high technology of on-board devices installed on modern spacecraft. The technology that complies with the up-to-date requirements of space communication is optical space communication. It is expected to provide for high-speed data transfer and increase the bandwidth several times, while ensuring immunity to common cyber threats, including jamming, spoofing and meaconing. The deployment of laser-based optical communication will not only contribute to increasing the air and space operation safety levels, but also enable deep space exploration. To this end, NASA’s Laser Communications Relay Demonstration Project (LCRD) is currently undergoing development and testing. This chapter undertakes to characterise the emerging technology with respect to its operating principles, the future scope of applications and involvement in currently conducted experiments. The results from the analysis are presented in the form of scenarios outlining possible applications of laser communication.

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17

Kim, Geuk-Nam, Sang-Young Park, Sehyun Seong, Jae-Young Choi, Sang-Kook Han, Young-Eon Kim, Suyong Choi et al. „Design of Novel Laser Crosslink Systems Using Nanosatellites in Formation Flying: The VISION“. Aerospace 9, Nr. 8 (03.08.2022): 423. http://dx.doi.org/10.3390/aerospace9080423.

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With growth in data volume from space missions, interest in laser communications has increased, owing to their importance for high-speed data transfer in the commercial and defense fields, spaceborne remote sensing, and surveillance. Here, we propose a novel system for space-to-space laser communication, a very high-speed inter-satellite link system using an infrared optical terminal and nanosatellite (VISION), which is aimed at establishing and validating miniaturized laser crosslink systems and several space technologies using two 6U nanosatellites in formation flying. An optical link budget analysis is conducted to derive the signal-to-noise ratio requirements and allocate the system budget; the optical link margin should be greater than 10 dB to guarantee communication with practical limitations. The payload is a laser transceiver with a deployable space telescope to enhance the gain of the beam transmission and reception. Nanosatellites, including precise formation flying GNC systems, are designed and analyzed. The attitude control system ensures pointing and tracking errors within tens of arcsec, and they are equipped with a propulsion system that can change the inter-satellite distance rapidly and accurately. This novel concept of laser crosslink systems is expected to make a significant contribution to the future design and construction of high-speed space-to-space networks.

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18

Dmytryszyn, Mark, Matthew Crook und Timothy Sands. „Lasers for Satellite Uplinks and Downlinks“. Sci 2, Nr. 2 (12.06.2020): 44. http://dx.doi.org/10.3390/sci2020044.

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The use of Light Amplification by Stimulated Emission of Radiation (i.e., LASERs or lasers) by the U.S. Department of Defense is not new and includes laser weapons guidance, laser-aided measurements, even lasers as weapons (e.g., Airborne Laser). Lasers in support of telecommunications is also not new. The use of laser light in fiber optics shattered thoughts on communications bandwidth and throughput. Even the use of lasers in space is no longer new. Lasers are being used for satellite-to-satellite crosslinking. Laser communication can transmit orders-of-magnitude more data using orders-of-magnitude less power and can do so with minimal risk of exposure to the sending and receiving terminals. What is new is using lasers as the uplink and downlink between the terrestrial segment and the space segment of satellite systems. More so, the use of lasers to transmit and receive data between moving terrestrial segments (e.g., ships at sea, airplanes in flight) and geosynchronous satellites is burgeoning. This manuscript examines the technological maturation of employing lasers as the signal carrier for satellite communications linking terrestrial and space systems. The purpose of the manuscript is to develop key performance parameters (KPPs) to inform U.S. Department of Defense initial capabilities documents (ICDs) for near-future satellite acquisition and development. By appreciating the history and technological challenges of employing lasers rather than traditional radio frequency sources for satellite uplink and downlink signal carrier, this manuscript recommends ways for the U.S. Department of Defense to employ lasers to transmit and receive high bandwidth, large-throughput data from moving platforms that need to retain low probabilities of detection, intercept, and exploitation (e.g., carrier battle group transiting to a hostile area of operations, unmanned aerial vehicle collecting over adversary areas). The manuscript also intends to identify commercial sector early-adopter fields and those fields likely to adapt to laser employment for transmission and receipt.

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19

Dmytryszyn, Mark, Matthew Crook und Timothy Sands. „Lasers for Satellite Uplinks and Downlinks“. Sci 2, Nr. 3 (09.09.2020): 71. http://dx.doi.org/10.3390/sci2030071.

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The use of Light Amplification by Stimulated Emission of Radiation (i.e., LASERs or lasers) by the U.S. Department of Defense is not new and includes laser weapons guidance, laser-aided measurements, even lasers as weapons (e.g., Airborne Laser). Lasers in support of telecommunications is also not new. The use of laser light in fiber optics shattered thoughts on communications bandwidth and throughput. Even the use of lasers in space is no longer new. Lasers are being used for satellite-to-satellite crosslinking. Laser communication can transmit orders-of-magnitude more data using orders-of-magnitude less power and can do so with minimal risk of exposure to the sending and receiving terminals. What is new is using lasers as the uplink and downlink between the terrestrial segment and the space segment of satellite systems. More so, the use of lasers to transmit and receive data between moving terrestrial segments (e.g., ships at sea, airplanes in flight) and geosynchronous satellites is burgeoning. This manuscript examines the technological maturation of employing lasers as the signal carrier for satellite communications linking terrestrial and space systems. The purpose of the manuscript is to develop key performance parameters (KPPs) to inform U.S. Department of Defense initial capabilities documents (ICDs) for near-future satellite acquisition and development. By appreciating the history and technological challenges of employing lasers rather than traditional radio frequency sources for satellite uplink and downlink signal carrier, this manuscript recommends ways for the U.S. Department of Defense to employ lasers to transmit and receive high bandwidth, large-throughput data from moving platforms that need to retain low probabilities of detection, intercept, and exploitation (e.g., carrier battle group transiting to a hostile area of operations, unmanned aerial vehicle collecting over adversary areas). The manuscript also intends to identify commercial sector early-adopter fields and those fields likely to adapt to laser employment for transmission and receipt.

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20

Dmytryszyn, Mark, Matthew Crook und Timothy Sands. „Lasers for Satellite Uplinks and Downlinks“. Sci 3, Nr. 1 (04.01.2021): 4. http://dx.doi.org/10.3390/sci3010004.

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The use of Light Amplification by Stimulated Emission of Radiation (i.e., LASERs or lasers) by the U.S. Department of Defense is not new and includes laser weapons guidance, laser-aided measurements, and even lasers as weapons (e.g., Airborne Laser). Lasers in the support of telecommunications is also not new. The use of laser light in fiber optics has shattered thoughts on communications bandwidth and throughput. Even the use of lasers in space is no longer new. Lasers are being used for satellite-to-satellite crosslinking. Laser communication can transmit orders-of-magnitude more data using orders-of-magnitude less power and can do so with minimal risk of exposure to the sending and receiving terminals. What is new is using lasers as the uplink and downlink between the terrestrial segment and the space segment of satellite systems. More so, the use of lasers to transmit and receive data between moving terrestrial segments (e.g., ships at sea, airplanes in flight) and geosynchronous satellites is burgeoning. This manuscript examines the technological maturation of employing lasers as the signal carrier for satellite communications linking terrestrial and space systems. The purpose of the manuscript is to develop key performance parameters (KPPs) to inform the U.S. Department of Defense initial capabilities documents (ICDs) for near-future satellite acquisition and development. By appreciating the history and technological challenges of employing lasers, rather than traditional radio frequency sources for satellite uplink and downlink signal carriers, this manuscript recommends ways for the U.S. Department of Defense to employ lasers to transmit and receive high bandwidth, and large-throughput data from moving platforms that need to retain low probabilities of detection, intercept, and exploit (e.g., carrier battle group transiting to a hostile area of operations, unmanned aerial vehicle collecting over adversary areas). The manuscript also intends to identify commercial sector early-adopter fields and those fields likely to adapt to laser employment for transmission and receipt.

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21

Dammacco, Giada, Dirk Wenzel und Christian Hennigs. „Prosys-Laser: Smart Laser Protective Textile Systems“. Advances in Science and Technology 80 (September 2012): 156–62. http://dx.doi.org/10.4028/www.scientific.net/ast.80.156.

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“Passive” and “active” laser-protective clothing and curtains are hardly available on the market today for the use with hand-held laser processing devices (HLD) and automated laser machines. However, the fact that serious laser injuries of the skin happen shows that skin protection against laser radiation is necessary. Thus, key developments described in this paper are on the one hand highly innovative functional multi-layer technical textiles, providing a high level of passive laser resistance. On the other hand, active systems, containing functional multi-layer smart fabrics which detect laser exposure and, by means of a safety control, deactivate the laser beam automatically, are depicted. Furthermore, test methods and testing set-ups to qualify such passive and active functional technical textiles and tailored personal protective equipment (PPE) are developed. The passive laser-protective textile system will be realized using the best combination of materials, providing, at the same time, laser, fire, and heat protection together with other properties. Designing active system means the realization of functionalized fabrics and to exploit their physical properties. The electronics which interface the active system, providing signal conditioning, acquisition, on-body pre-processing, local data storage and wireless communication, is a major part of the active approach. The electronics will provide alarms and ultimately enforce laser shutdown upon defined conditions.

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22

Zhou, Li. „Optical System in Laser Inter-Satellites Communication“. Advanced Materials Research 945-949 (Juni 2014): 2213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2213.

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We know that Inter-satellites communica-tion is a very important to us.However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network. The traditional satellites communication and inter-satellites links are built by microwave. Recent years, laser links for inter-satellites communication are becoming more and more important.

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23

Abramova, Evgenia S., Vyacheslav F. Myshkin, Valery A. Khan, Sergey F. Balandin, Roman S. Eremeev, Maria S. Pavlova und Dmitry M. Horohorin. „ON THE USE OF BISTATIC UNDERWATER OPTICAL COMMUNICATION SYSTEMS“. T-Comm 14, Nr. 8 (2020): 4–12. http://dx.doi.org/10.36724/2072-8735-2020-14-8-4-12.

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Atmospheric and underwater optical communication lines have much in common due to variable conditions for the transmission of laser radiation along the path of the communication line, both in time and in space. The passage of a laser beam through a cloudy medium is accompanied by a decrease in the radiation intensity and an increase in the intensity of the scattered flux, which forms illumination, the intensity of which decreases with distance from the laser beam. As a rule, at the scales of distances at which the radiation of the optical range decays by several orders of magnitude, water in natural systems is homogeneous. The analysis shows that water in natural reservoirs is a light-attenuating medium both due to attenuation on dispersed particles and due to scattering on nanobubbles. The article analyzes the capabilities of atmospheric and underwater optical communication systems (POS). The results of modeling bistatic PIC in a reservoir containing particles with a diameter of 0.8 ?m and a concentration of 2 х 107 cm-3 are presented. It was shown that the parameters of the bistatic PIC pulses are significantly affected by nanobubbles in water. In natural reservoirs, the use of systems with direct line of sight is preferable. It has been shown that bistatic PICs, in which the scattering region is located on the side of the receiver unit relative to the transmitter - receiver line, have the greatest energy potential and minimal intersymbol interference. In natural reservoirs, it is possible to use such bistatic PICs for communication with a frequency of less than 20 MHz at distances of not more than 20 m. As a scattering region in bistatic PIC, you can use the bottom of the reservoir, the surface of the water or the region of water with a higher turbidity than the rest of the reservoir.

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24

Shi-Jie, GAO, WU Jia-Bin, LIU Yong-Kai, MA Shuang, NIU Yan-Jun und YANG Hui-sheng. „Development status and trend of micro-satellite laser communication systems“. Chinese Optics 13, Nr. 6 (2020): 1–11. http://dx.doi.org/10.37188/co.2020-0033.

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25

Lu hongqiang, 陆红强, 赵卫 Zhaowei, 胡辉 Wangwei, 汪伟 Huhui und 谢小平 Xie xiaoping. „The Effects of beam misalignment on space laser communication systems“. High Power Laser and Particle Beams 23, Nr. 4 (2011): 895–900. http://dx.doi.org/10.3788/hplpb20112304.0895.

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26

Tascillo, Mark A. „Adaptive jitter rejection technique applicable to airborne laser communication systems“. Optical Engineering 34, Nr. 5 (01.05.1995): 1263. http://dx.doi.org/10.1117/12.201638.

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27

Hoang, Thang Manh, Sanjay K. Palit, Sayan Mukherjee und Santo Banerjee. „Synchronization and secure communication in time delayed semiconductor laser systems“. Optik 127, Nr. 22 (November 2016): 10930–47. http://dx.doi.org/10.1016/j.ijleo.2016.08.105.

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28

Tang, Ming Hui, Mi Li, Yan Li, Jia Chen Ding und Guo Liang Xu. „Investigation of the Performance of OOK, 2DPSK, QDPSK in Downlink of Ground-to-Satellite Laser Communication Systems“. Applied Mechanics and Materials 411-414 (September 2013): 749–52. http://dx.doi.org/10.4028/www.scientific.net/amm.411-414.749.

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With the development of satellite laser communication, modulation scheme has been the key technique for the modulation subsystem. The performance in terms of bite-error rate of OOK, 2DPSK, QDPSK used in the downlink of the ground-to-satellite laser communication systems are compared with the consideration of the combined effects of both intensity scintillation and detector noise. Simulation results are given and the advantages and disadvantages of the three modulation schemes are also studied. The design of the downlink of ground-to-satellite laser communication system can benefit from this work.

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Zhai, Xu Hua, und Hong Tao Zhang. „Compensation Experiment Analysis of Adaptive Optical System in Space Laser Communication“. Advanced Materials Research 201-203 (Februar 2011): 491–94. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.491.

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Fast steering mirrors（FSM） and deformable reflective mirrors (DRM) of adaptive optical systems (AOS) can significantly deduce laser transmitting attenuations caused by atmosphere turbulence in space laser communication systems. In this paper, Strehl ratio (SR) as an important compensating evaluation parameter was used and the compensating errors were also analyzed. The compensating effects of optical wavefront for atmosphere disturbance were put forward when the refractive index structure constants and transverse wind speeds were uniform distributions.

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Peng, P. C., K. C. Shiu, Y. M. Chen, M. A. Bitew, W. Y. Lee, C. H. Lai und Y. W. Peng. „Multiwavelength Laser Module Based on Distribute Feedback Laser Diode for Broadcast and Communication Systems“. IEEE Photonics Journal 8, Nr. 4 (August 2016): 1–8. http://dx.doi.org/10.1109/jphot.2016.2591440.

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Karpathakis, Skevos F. E., Benjamin P. Dix-Matthews, Shane M. Walsh, Ayden S. McCann, David R. Gozzard, Alex M. Frost, Charles T. Gravestock und Sascha W. Schediwy. „Ground-to-Drone Optical Pulse Position Modulation Demonstration as a Testbed for Lunar Communications“. Drones 7, Nr. 2 (31.01.2023): 99. http://dx.doi.org/10.3390/drones7020099.

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Free-space optical (FSO) communication promises to bring fibre-like speeds to data transmissions between ground, sky and space. This is becoming more important in light of the increasing volume of data collected by aircraft and spacecraft. The University of Western Australia (UWA) is commissioning optical ground stations to support FSO communications payloads. We propose retroreflected laser links to drones as a useful step towards further ground-to-sky and ground-to-space FSO communications demonstrations. In this paper, we describe the operation of a hardware testbed for a high photon efficiency optical communication physical layer. This testbed was deployed over a slanted free space link to a drone to verify sub-systems required in communication between the ground station and a spacecraft in cis-Lunar space. Accomplishing this verification of the telescope pointing systems and communications systems would have otherwise been much harder or impossible without using a retroreflected drone link.

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Vilcane, K., S. Matsenko, M. Parfjonovs, R. Murnieks, M. Aleksejeva und S. Spolitis. „Implementation of Multi-Wavelength Source for DWDM-PON Fiber Optical Transmission Systems“. Latvian Journal of Physics and Technical Sciences 57, Nr. 4 (01.08.2020): 24–33. http://dx.doi.org/10.2478/lpts-2020-0019.

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AbstractFour-wave mixing (FWM) is one of the well-known nonlinear optical effects (NOE), and it is considered as an adverse impact in fibre optical communication lines. This nonlinear optical effect as a productive one can be used in fibre optical communication systems for various optical processing functions, like wavelength conversion, high-speed time-division multiplexing (TDM), pulse compression, fibre optical parametric amplifiers (FOPA), etc. In most of the fibre optical communication systems, each data transmission channel requires one light source (e.g., laser) as a carrier, which can make these transmission systems expensive. For example, to provide operation of 4-channel dense wavelength-division-multiplexed (DWDM) system four separate lasers at specific operation wavelengths are needed. On the contrary, through the FWM effect, which can be obtained in highly nonlinear optical fibre (HNLF) by using two high-power pump lasers, the generation of new multiple carriers forming the laser array or a multi-wavelength source is possible. Accordingly, within the present research, we investigate the latter approach for FWM light source implementation in DWDM passive optical networks (DWDM-PONs). We analyse up to 16-channel 50 GHz spaced DWDM-PON system with a bitrate of up to 10 Gbit/s per channel, constructed on the basis of two high-power continuous wave (CW) pump lasers. We evaluate the system performance against the number of its channels by changing it from 4 to 16 and in each case find the most optimal HNLF fibre length (for a 4-channel system it is 0.9 km; for an 8-channel system – 1.39 km; and for a 16-channel system – 1.05 km) and laser pump powers (for a 4-channel system it is 20 dBm; for an 8-channel system – 24.1 dBm; and for a 16-channel system – 26.3 dBm). These optimal parameters were found in order to get the highest system performance, respectively, the lowest BER (threshold BER≤10−10), and minimal power fluctuations among FWM generated carriers. The obtained results show that the proposed transmission system can be a promising solution for next-generation high-speed PONs.

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HSU, H., T. N. LI, E. Z. YANG, J. L. YU, J. LÜ, YUE XU und YAN GAO. „EFFECT OF PHONONS IN STIMULATED BRILLOUIN SCATTERING ON OPTICAL FIBER COMMUNICATION“. Journal of Nonlinear Optical Physics & Materials 14, Nr. 01 (März 2005): 1–8. http://dx.doi.org/10.1142/s0218863505002463.

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Stimulated Brillouin scattering (SBS) can be used for phase conjugation mirrors in many laser systems1,5 and it also often appears in long distance optical fiber communication systems because the threshold of SBS is normally inversely proportional to the interaction length.2 In this paper, the effect of phonon loss is investigated. Our study shows that phase conjugation systems do require lower phonon loss and higher nonlinearity as expected but higher phonon loss and lower nonlinearity are actually desirable for long distance optical fiber communications.

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Li, Xiang Yang, und Zong Feng Ma. „Hybrid Laser/Microwave Wireless Communication System for Fractionated Cluster Spacecraft“. Applied Mechanics and Materials 651-653 (September 2014): 2036–39. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.2036.

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Compared with conventional a single, “monolithic” satellite, fractionated cluster spacecraft system has the advantages of enhancing the adaptability and survivability of space systems while also shortening development expense. A novel wireless communication system that combines both microwave and laser technology has been investigated and demonstrated. The experiment results show that the hybrid laser/microwave wireless communication can offer excellent information services and meet the cluster system requirement.

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ARAKI, Ken-ichi, und Yoji FURUHAMA. „Optical Beam Tracking/Pointing Stability in Free-Space Laser Communication Systems.“ Review of Laser Engineering 19, Nr. 6 (1991): 538–43. http://dx.doi.org/10.2184/lsj.19.6_538.

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Ribeiro, R. F. S., F. Da Rocha und A. V. T. Cartaxo. „Influence of laser phase noise on dispersive optical fiber communication systems“. IEEE Photonics Technology Letters 7, Nr. 12 (Dezember 1995): 1510–12. http://dx.doi.org/10.1109/68.477298.

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Moura, C. G., O. Carvalho, V. H. Magalhães, R. S. F. Pereira, M. F. Cerqueira, L. M. V. Gonçalves, R. M. Nascimento und F. S. Silva. „Laser printing of micro-electronic communication systems for smart implants applications“. Optics & Laser Technology 128 (August 2020): 106211. http://dx.doi.org/10.1016/j.optlastec.2020.106211.

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Popoola, W. O., Z. Ghassemlooy, C. G. Lee und A. C. Boucouvalas. „Scintillation effect on intensity modulated laser communication systems—a laboratory demonstration“. Optics & Laser Technology 42, Nr. 4 (Juni 2010): 682–92. http://dx.doi.org/10.1016/j.optlastec.2009.11.011.

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Esser, Peter D., Ethan J. Halpern und E. S. Amis. „Quality assurance of picture archiving communication systems with laser film digitizers“. Journal of Digital Imaging 4, Nr. 4 (November 1991): 248–50. http://dx.doi.org/10.1007/bf03173907.

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Ishikawa, H., H. Soda, K. Wakao, K. Kihara, K. Kamite, Y. Kotaki, M. Matsuda et al. „Distributed feedback laser emitting at 1.3 µm for gigabit communication systems“. Journal of Lightwave Technology 5, Nr. 6 (1987): 848–55. http://dx.doi.org/10.1109/jlt.1987.1075570.

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Chen, Jiayu, Jinsheng Liu, Long Han, Mingru Ci, Dongbo Che, Lihong Guo und Hongjun Yu. „Theory of AdaDelSPGD Algorithm in Fiber Laser-Phased Array Multiplex Communication Systems“. Applied Sciences 12, Nr. 6 (16.03.2022): 3009. http://dx.doi.org/10.3390/app12063009.

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Stochastic parallel gradient descent (SPGD) algorithm is one of the most promising methods for effective coherent beam combination. However, the algorithm also has some disadvantages, such as slow convergence speed and local extremum. This paper proposes an AdaDelSPGD algorithm, which combines an AdaDelta algorithm with a SPGD algorithm, and improves the traditional AdaDelta algorithm with adaptive gain coefficient. It is worth noting that the adaptive gain coefficient can be adjusted in real time to improve the convergence rate. The effectiveness of the proposed algorithm is verified by relevant simulation experiments, and the results show that the proposed algorithm can significantly improve the convergence speed. Following the experiments with the fiber laser-phased array multiplex communication system, we can draw the conclusion that the addition of communication modulation reduces the beam quality, and the higher the modulation frequency, the worse the beam quality. However, adding the SPGD algorithm can improve the beam quality. The AdaDelSPGD algorithm proposed in this paper can further improve the beam quality, and the bit error rate of communication is also decreased after testing. This provides a foundation for further research on the fiber laser-phased array multiplex communication system.

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Guo, Bo, Xinyu Guo, Renlai Zhou, Zhongyao Ren, Qiumei Chen, Ruochen Xu und Wenbin Luo. „Multi-Pulse Bound Soliton Fiber Laser Based on MoTe2 Saturable Absorber“. Nanomaterials 13, Nr. 1 (30.12.2022): 177. http://dx.doi.org/10.3390/nano13010177.

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Bound solitons have become a hot topic in the field of nonlinear optics due to their potential applications in optical communication, information processing and radar systems. However, the trapping of the cascaded bound soliton is still a major challenge up to now. Here, we propose and experimentally demonstrate a multi-pulse bound soliton fiber laser based on MoTe2 saturable absorber. In the experiment, MoTe2 nanosheets were synthesized by chemical vapor deposition and transferred to the fiber taper by optical deposition. Then, by inserting the MoTe2 saturable absorber into a ring cavity laser, the two-pulse, three-pulse and four-pulse bound solitons can be stably generated by properly adjusting the pump strength and polarization state. These cascaded bound solitons are expected to be applied to all-optical communication and bring new ideas to the study of soliton lasers.

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Sirleto, Luigi, und Maria Antonietta Ferrara. „Fiber Amplifiers and Fiber Lasers Based on Stimulated Raman Scattering: A Review“. Micromachines 11, Nr. 3 (26.02.2020): 247. http://dx.doi.org/10.3390/mi11030247.

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Nowadays, in fiber optic communications the growing demand in terms of transmission capacity has been fulfilling the entire spectral band of the erbium-doped fiber amplifiers (EDFAs). This dramatic increase in bandwidth rules out the use of EDFAs, leaving fiber Raman amplifiers (FRAs) as the key devices for future amplification requirements. On the other hand, in the field of high-power fiber lasers, a very attractive option is provided by fiber Raman lasers (FRLs), due to their high output power, high efficiency and broad gain bandwidth, covering almost the entire near-infrared region. This paper reviews the challenges, achievements and perspectives of both fiber Raman amplifier and fiber Raman laser. They are enabling technologies for implementation of high-capacity optical communication systems and for the realization of high power fiber lasers, respectively.

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Chen, Chen. „Special Issue on “Visible Light Communication (VLC)”“. Photonics 9, Nr. 5 (21.04.2022): 284. http://dx.doi.org/10.3390/photonics9050284.

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Due to its appealing advantages, including abundant and unregulated spectrum resources, no electromagnetic interference (EMI) radiation and high security, visible light communication (VLC) using light-emitting diodes (LEDs) or laser diodes (LDs) has been envisioned as one of the key enabling technologies for 6G and Internet of Things (IoT) systems [...]

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Zhang, Hong Tao, und Xu Hua Zhai. „Compensation Effects Analysis of Adaptive Optical System Based on Space Laser Communications“. Advanced Materials Research 201-203 (Februar 2011): 495–98. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.495.

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The effects of atmosphere turbulence on optical beams transmitting in space laser communication system were analyzed by using sixty-one units adaptive optical system in the paper. Laser communication systems from low earth orbit planet to ground station were imitated by way of optical design software. In addition, the compensating results, experimental phenomena and data based on adaptive optics were also analyzed.

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Hammad, Mohab, Aleksandra Kaszubowska-Anandarajah, M. Pascual, Pascal Landais, Prajwal Lakshmijayasimha, Gaurav Jain und Prince Anandarajah. „Characterization and Direct Modulation of a Multi-Section PIC Suited for Short Reach Optical Communication Systems“. Photonics 7, Nr. 3 (31.07.2020): 55. http://dx.doi.org/10.3390/photonics7030055.

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A multi-section active photonic integrated circuit (PIC) is characterized in detail to gauge its suitability as a transmitter for short reach applications. The PIC is 1.5 mm long and consists of two lasers integrated in a master-slave configuration, which enables optical injection locking (OIL) of the slave laser. The beneficial impact of the injection is characterized by static and dynamic measurements. The results show a reduction of the optical linewidth from 8 MHz to 2 MHz, a relative intensity noise (RIN) value as low as −154.3 dB/Hz and a 45% improvement of the slave laser modulation bandwidth from 9.5 GHz to 14 GHz. This frequency response enhancement allows the direct modulation of the slave gain section at a data rate of 10.7 Gb/s and an error-free transmission over 25 km of standard single-mode fiber (SSMF). Transmission performance of the injected case shows a 2 dB improvement in the minimum optical power required to achieve a bit error rate of 3.8×10−3 (hard decision forward error correction limit). These results demonstrate that the multi-section PIC can serve as an attractive cost-efficient transmitter in a wide variety of low-cost short-reach data communication applications.

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Jiang, Guozhou, und Liu Yang. „Multi-Level Phase Noise Model for CO-OFDM Spatial-Division Multiplexed Transmission“. Photonics 10, Nr. 1 (23.12.2022): 8. http://dx.doi.org/10.3390/photonics10010008.

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Spatial division multiplexed (SDM) transmission systems with coherence communication technology have become an important issue in meeting the demands for the capacity of fiber. However, research on the phase noise from lasers is mainly focused on single-channel systems or single-carrier SDM systems. In this paper, a phase noise model comprising common laser phase noise, in addition to the core phase drifts induced by the SDM, is introduced and analyzed for a coherence orthogonal frequency-division multiplexing (CO-OFDM) spatial-division multiplexed transmission (SDM) system. Based on the phase noise model, the applicability of the blind phase search algorithm and the pilot-aided phase estimation algorithm is discussed and demonstrated via simulation. The results show that these two algorithms can work well when considering combined laser linewidths with core phase drifts for CO-OFDM 7-core multi-core fiber (MCF). The results mean that with the SDM phase noise model, phase noise estimation in other cores can be transferred from one core to lower the complexity with the help of the model. This research provides a proper application of the phase noise analysis of large-capacity optical communication based on a weak-coupled MCF.

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Ali, Mohanad H., Mahmood H. Enad, Jasim Mohmed Jasim, Rawaa A. Abdul-Nab und Nadia Alani. „Study of impact of art performance level of blue laser technology applications and its control“. Indonesian Journal of Electrical Engineering and Computer Science 17, Nr. 3 (01.03.2020): 1383. http://dx.doi.org/10.11591/ijeecs.v17.i3.pp1383-1389.

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<p><span>In this work; we present an enhancement in blue laser diodes with new factors and applications for modern technology such as underwater telecommunications, bio-sensor and bio-medical systems etc. Years of advance meanwhile have much enhanced laser performance, and extremely improved their diversity, making lasers significant parts in scientific research, telecommunications, engineering, bio-medical imaging, materials working, and a swarm of other applications. This article viewing how laser technology has progressed to chance application requirements. The enhanced blue laser building diagrams to get a peak efficiency% at room temperature with modification. Moreover, we have as well estimated electro-optical performance packing of blue laser diodes been significantly various associated to GaAs laser method and novel developments and performances are required to enhance the optical power from anther laser diodes. Researchers need enhanced approaches to accurately make new the blue laser applications to use control of modern experimental measurements and optical communication.</span></p>

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Huynh, Tam N., Frank Smyth, Lim Nguyen und Liam P. Barry. „Effects of phase noise of monolithic tunable laser on coherent communication systems“. Optics Express 20, Nr. 26 (29.11.2012): B244. http://dx.doi.org/10.1364/oe.20.00b244.

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Li, Mi, Yifeng Hong, Su Wang, Yuejiang Song und Xun Sun. „Radiation-induced mismatch effect on performances of space chaos laser communication systems“. Optics Letters 43, Nr. 20 (15.10.2018): 5134. http://dx.doi.org/10.1364/ol.43.005134.

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