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Letteratura scientifica selezionata sul tema "Optical communications"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 29 luglio 2024

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Articoli di riviste sul tema "Optical communications"

Okoshi, Takanori, e Akira Hirose. "Optical communication techniques; A prospect of optical communications." Journal of the Institute of Television Engineers of Japan 42, n. 5 (1988): 460–67. http://dx.doi.org/10.3169/itej1978.42.460.

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Kuwahara, Hideo, e Jim Theodoras. "Optical communications". IEEE Communications Magazine 47, n. 11 (novembre 2009): 42. http://dx.doi.org/10.1109/mcom.2009.5307464.

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Agrell, Erik, Magnus Karlsson, Francesco Poletti, Shu Namiki, Xi (Vivian) Chen, Leslie A. Rusch, Benjamin Puttnam et al. "Roadmap on optical communications". Journal of Optics 26, n. 9 (17 luglio 2024): 093001. http://dx.doi.org/10.1088/2040-8986/ad261f.

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Abstract The Covid-19 pandemic showed forcefully the fundamental importance broadband data communication and the internet has in our society. Optical communications forms the undisputable backbone of this critical infrastructure, and it is supported by an interdisciplinary research community striving to improve and develop it further. Since the first ‘Roadmap of optical communications’ was published in 2016, the field has seen significant progress in all areas, and time is ripe for an update of the research status. The optical communications area has become increasingly diverse, covering research in fundamental physics and materials science, high-speed electronics and photonics, signal processing and coding, and communication systems and networks. This roadmap describes state-of-the-art and future outlooks in the optical communications field. The article is divided into 20 sections on selected areas, each written by a leading expert in that area. The sections are thematically grouped into four parts with 4–6 sections each, covering, respectively, hardware, algorithms, networks and systems. Each section describes the current status, the future challenges, and development needed to meet said challenges in their area. As a whole, this roadmap provides a comprehensive and unprecedented overview of the contemporary optical communications research, and should be essential reading for researchers at any level active in this field.

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Jukan, Admela, e Xiang Liu. "Optical communications networks". IEEE Communications Magazine 54, n. 8 (agosto 2016): 108–9. http://dx.doi.org/10.1109/mcom.2016.7537184.

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Sunak, H. R. D. "Optical fiber communications". Proceedings of the IEEE 73, n. 10 (1985): 1533–34. http://dx.doi.org/10.1109/proc.1985.13332.

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Chan, V. W. S. "Optical space communications". IEEE Journal of Selected Topics in Quantum Electronics 6, n. 6 (novembre 2000): 959–75. http://dx.doi.org/10.1109/2944.902144.

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KIKUCHI, Kazuo. "Coherent Optical Communications". Review of Laser Engineering 13, n. 6 (1985): 460–66. http://dx.doi.org/10.2184/lsj.13.460.

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Elmirghani, J. M. H. "Optical wireless communications". IEEE Communications Magazine 41, n. 3 (marzo 2003): 48. http://dx.doi.org/10.1109/mcom.2003.1186544.

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Kuwahara, Hideo, e Jim Theodoras. "Optical Communications: Optical Equinox [Guest Editorial]". IEEE Communications Magazine 45, n. 8 (agosto 2007): 24. http://dx.doi.org/10.1109/mcom.2007.4290310.

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Wang, Jun-Bo, Yuan Jiao, Xiaoyu Song e Ming Chen. "Optimal training sequences for indoor wireless optical communications". Journal of Optics 14, n. 1 (8 dicembre 2011): 015401. http://dx.doi.org/10.1088/2040-8978/14/1/015401.

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Tesi sul tema "Optical communications"

Boiyo, Duncan Kiboi, e Romeo Gamatham. "Optimization of flexible spectrum in optical transport networks". Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/14609.

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The ever-increasing demand for broadband services by end-user devices utilising 3G/4G/LTE and the projected 5G in the last mile will require sustaining broadband supply from fibre-linked terminals. The eventual outcome of the high demand for broadband is strained optical and electronic devices. The backbone optical fibre transport systems and techniques such as dense wavelength division multiplexing (DWDM), higher modulation formats, coherent detection and signal amplification have increased both fibre capacity and spectrum efficiency. A major challenge to fibre capacity and spectrum efficiency is fibre-faults and optical impairments, network management, routing and wavelength assignment (RWA). In this study, DWDM and flexible spectrum techniques such as wavelength assignment and adjustment, wavelength conversion and switching, optical add and drop multiplexing (OADM) and bitrate variable transmission have been experimentally optimized in a laboratory testbed for short- and long-haul optical fibre networks. This work starts by experimentally optimising different transmitters, fibre-types and receivers suitable for implementing cost effective and energy efficient flexible spectrum networks. Vertical cavity surface-emitting lasers (VCSELs) and distributed feedback (DFB) lasers have been studied to provide up to 10 Gb/s per channel in 1310 nm and 1550 nm transmission windows. VCSELs provide wavelength assignment and adjustment. This work utilises the non-return-to-zero (NRZ) on-off keying (OOK) modulation technique and direct detection due to their cost and simplicity. By using positive intrinsic negative (PIN) photo-receivers with error-free BER sensitivity of -18±1 dBm at the acceptable 10-9-bit error rate (BER) threshold level, unamplified transmission distances between 6 km and 76 km have been demonstrated using G.652 and G.655 single mode fibres (SMFs). For the first time, an all optical VCSEL to VCSEL wavelength conversion, switching, transmission at the 1550 nm window and BER evaluation of a NRZ data signal is experimentally demonstrated. With VCSEL wavelength conversion and switching, wavelength adjustments to a spectrum width of 4.8 nm (600 GHz) can be achieved to provide alternative routes to signals when fibre-cuts and wavelength collision occurs therefore enhancing signal continuity. This work also demonstrates a technique of removing and adding a wavelength in a bundle of DWDM and flexible channels using an OADM. This has been implemented using a VCSEL and a fibre Bragg grating (FBG) providing a wavelength isolation ratio of 31.4 dB and ~0.3 𝑑𝐵 add/drop penalty of 8.5 Gb/s signal. As a result, an OADM improves spectrum efficiency by offering wavelength re-use. Optical impairments such as crosstalk, chromatic dispersion (CD) and effects of polarization mode dispersion (PMD) have been experimentally investigated and mitigated. This work showed that crosstalk penalty increased with fibre-length, bitrate, interfering signal power and reduced channel spacing and as a result, a crosstalk-penalty trade-off is required. Effects of CD on a transmitted 10 Gb/s signal were also investigated and its mitigation techniques used to increase the fibre-reach. This work uses the negative dispersion fibres to mitigate the accumulated dispersion over the distance of transmission. A 5 dB sensitivity improvement is reported for an unamplified 76 km using DFB transmitters and combination of NZDSF true-wave reduced slope (TW-RS) and submarine reduced slope (TW-SRS) with + and – dispersion coefficients respectively. We have also demonstrated up to 52 km 10 Gb/s per channel VCSEL-based transmission and reduced net dispersion. Experimental demonstration of forward Raman amplification has achieved a 4.7 dB on-off gain distributed over a 4.8 nm spectral width and a 1.7 dB improvement of receiver sensitivity in Raman-aided 10 Gb/s per wavelength VCSEL transmission. Finally, 4.25-10 Gb/s PON-based point to point (P2P) and point to multipoint (P2MP) broadcast transmission have been experimentally demonstrated. A 10 Gb/s with a 1:8 passive splitter incurred a 3.7 dB penalty for a 24.7 km fibre-link. In summary, this work has demonstrated cost effective and energy efficient potential flexible spectrum techniques for high speed signal transmission. With the optimized network parameters, flexible spectrum is therefore relevant in short-reach, metro-access and long-haul applications for national broadband networks and the Square Kilometre Array (SKA) fibre-based signal and data transmission.

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Liu, Jingjing. "Optically powered transceiver for optical wireless communications". Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509980.

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Jin, Xian. "Integrated optical devices for free-space optical communications". Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/17406.

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Optical wireless communication technologies for free-space optical (FSO) transmission, distribution, and reception have numerous potential benefits. Such systems offer incredibly high data communication rates (in the same way that fibre optic technologies have revolutionized long-haul Terabit/second data transmission) together with the distributive benefits of multi-user wireless networking. Communication devices for these FSO technologies are presented in this thesis. A macroscopic passive retroreflective structure is introduced first for signal retroreflection over the full 4π steradians solid angle. Modulation is demonstrated with this structure through the use of liquid crystal switching elements. The FSO device work is then extended with an active retroreflective structure incorporating corner-cube-based retro-detection with integrated and orthogonal photodiodes. An actively-controlled differential triangulation process is demonstrated with this novel device to optimize the optical channel alignment in the FSO communication system. The proposed integrated retroreflective structures are ideally-suited to bi-directional (uplink and downlink) multi-nodal systems and have potential to be extended to ultrafast (picosecond) optical modulation in future work.

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Diaz, Ariel Gomez. "Ultrafast indoor optical wireless communications". Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:2bd2257f-ae58-40f0-a10f-04e7b5336519.

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Traffic from wireless and mobile devices is predicted to increase 10-fold between 2014 and 2019, surpassing wired data traffic by 2016. Given the expected radio frequency (RF) capacity crunch, this growing wireless demand will have to be met using a variety of new technologies exploiting other parts of the electromagnetic spectrum. Promising research areas include the Millimetre Band as well as Optical Wireless Communications (OWC). Millimetre Band demonstrations have accomplished ultrafast multi-Gigabit links, making use of state-of-the-art fibre transmission systems. However, complex opto-electronic (OE) interfaces are required to convert the optical carrier into Millimetre wireless signals. To avoid these interfaces, an all-optical transparent network is proposed here, spanning over both the fibre and OWC domains, in order to deliver ultrahigh data rates to mobile end-users in indoor environments. This is supported by the recent deployment of fibre-to-the-home (FTTH) networks creating the potential for Terabit aggregate connections at the user's doorstep. Therefore, infrared fibre-wireless-fibre (FWF) links are studied to support data rates over 100 Gb/s in nomadic applications. The link coverage is achieved via narrow beam beamsteering over a wide field-of-view (FOV) using suitable localization and tracking techniques. The proposed model is inherently bidirectional and transparent, i.e. independent of the data rate and modulation format. In this thesis, the potential for ultrafast wide coverage OWCs using SMF-based transceivers and coherent transmission is demonstrated. A record data rate of 418 Gb/s and 209 Gb/s with a wide FOV of θ_FOV=±30° and θ_FOV=±20°, respectively, is shown at a free space range of 3 m. To the best of our knowledge, this is the fastest demonstration of an indoor wireless link that offers practical room-scale coverage. The automated alignment of this FWF link is also demonstrated with the design and implementation a mm-accurate localization and tracking system. Finally, architectures for point-to-multipoint communications are explored in order to adapt the system to multiple users.

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Parand, Farivar. "Cellular optical wireless communications systems". Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270654.

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Kim, Inwoong. "SYNCHRONIZATION IN ADVANCED OPTICAL COMMUNICATIONS". Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3564.

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All-optical synchronization and its application in advanced optical communications have been investigated in this dissertation. Dynamics of all-optical timing synchronization (clock recovery) using multi-section gain-coupled distributed-feedback (MS-GC DFB) lasers are discussed. A record speed of 180-GHz timing synchronization has been demonstrated using this device. An all-optical carrier synchronization (phase and polarization recovery) scheme from PSK (phase shift keying) data is proposed and demonstrated for the first time. As an application of all-optical synchronization, the characterization of advanced modulation formats using a linear optical sampling technique was studied. The full characterization of 10-Gb/s RZ-BPSK (return-to-zero binary PSK) data has been demonstrated. Fast lockup and walk-off of the all-optical timing synchronization process on the order of nanoseconds were measured in both simulation and experiment. Phase stability of the recovered clock from a pseudo-random bit sequence signal can be achieved by limiting the detuning between the frequency of free-running self-pulsation and the input bit rate. The simulation results show that all-optical clock recovery using TS-DFB lasers can maintain a better than 5 % clock phase stability for large variations in power, bit rate and optical carrier frequency of the input data and therefore is suitable for applications in ultrafast optical packet switching. All-optical timing synchronization of 180-Gb/s data streams has been demonstrated using a MS-GC DFB laser. The recovered clock has a jitter of less than 410 fs over a dynamic range of 7 dB. All-optical carrier synchronization from phase modulated data utilizes a phase sensitive oscillator (PSO), which used a phase sensitive amplifier (PSA) as a gain block. Furthermore, all-optical carrier synchronization from 10-Gb/s BPSK data was demonstrated in experiment. The PSA is configured as a nonlinear optical loop mirror (NOLM). A discrete linear system analysis was carried out to understand the stability of the PSO. Complex envelope measurement using coherent linear optical sampling with mode-locked sources is investigated. It is shown that reliable measurement of the phase requires that one of the optical modes of the sampling pulses be locked to the optical carrier of the data signal to be measured. Carrier-envelope offset (CEO) is found to have a negligible effect on the measurement. Measurement errors of the intensity profile and phase depend on the pulsewidth and chirp of the sampling pulses as well as the detuning between the carrier frequencies of the data signal and the center frequency of the sampling source. Characterization of the 10-Gb/s RZ-BPSK signal was demonstrated using the coherent detection technique. Measurements of the optical intensity profile, chirp and constellation diagram were demonstrated. A CW local oscillator was used and electrical sampling was performed using a sampling scope. A novel feedback scheme was used to stabilize homodyne detection.
Ph.D.
Other
Optics and Photonics
Optics

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Walker, N. G. "Multiport detection for optical communications". Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383934.

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Kingsbury, Ryan W. "Optical communications for small satellites". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101444.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 115-124).
Small satellites, particularly CubeSats, have become popular platforms for a wide variety of scientific, commercial and military remote sensing applications. Inexpensive commercial o the shelf (COTS) hardware and relatively low launch costs make these platforms candidates for deployment in large constellations that can offer unprecedented temporal and geospatial sampling of the entire planet. However, productivity for both individual and constellations of CubeSats in low earth orbit (LEO) is limited by the capabilities of the communications subsystem. Generally, these constraints stem from limited available electrical power, low-gain antennas and the general scarcity of available radio spectrum. In this thesis, we assess the ability of free space optical communication (lasercom) to address these limitations, identify key technology developments that enable its application in small satellites, and develop a functional prototype that demonstrates predicted performance. We first establish design goals for a lasercom payload archi- tecture that offers performance improvements (joules-per-bit) over radio-frequency (RF) solutions, yet is compatible with the severe size, weight and power (SWaP) constraints common to CubeSats. The key design goal is direct LEO-to-ground downlink capability with data rates exceeding 10 Mbps, an order of magnitude better than COTS radio solutions available today, within typical CubeSat SWaP constraints on the space terminal, and with similar COTS and low-complexity constraints on the ground terminal. After defining the goals for this architecture, we identify gaps in previous implementations that limit their performance: the lack of compact, power-efficient optical transmitters and the need for pointing capability on small satellites to be as much as a factor of ten better than what is commonly achieved today. One approach is to address these shortcomings using low-cost COTS components that are compatible with CubeSat budgets and development schedules. In design trade studies we identify potential solutions for the transmitter and pointing implementation gaps. Two distinct transmitter architectures, one based on a high-power laser diode and another using an optical amplifier, are considered. Analysis shows that both configurations meet system requirements, however, the optical amplifier offers better scalability to higher data rates. To address platform pointing limitations, we dene a staged control framework incorporating a COTS optical steering mechanism that is used to manage pointing errors from the coarse stage (host satellite body-pointing). A variety of ne steering solutions are considered, and microelectromechanical systems (MEMS) tip-tilt mirrors are selected due to their advantage in size, weight and power. We experimentally validate the designs resulting from the trade studies for these key subsystems. We construct a prototype transmitter using a modified COTS fiber amplifier and a directly-modulated seed laser capable of producing a 200mW average power, pulse position modulated optical output. This prototype is used to confirm power consumption predictions, modulation rate scalability (10 Mbps to 100 Mbps), and peak transmit power (e.g., 24.6W for PPM-128). The transmitter optical output, along with a simple loopback receiver, is used to validate the sensitivity of the avalanche photodiode receiver used for the ground receiver in the flight experiment configuration. The MEMS fine steering mechanisms, which are not rated for space use, are characterized using a purpose-built test apparatus. Characterization experiments of the MEMS devices focused on ensuring repeatable behavior (+/-0:11 mrad, 3-[sigma]) over the expected operating temperature range on the spacecraft (0°C to 40°C). Finally, we provide an assessment of the work that remains to move from the prototype to flight model and into on-orbit operations. Space terminal packaging and integration needs, as well as host spacecraft interface requirements are detailed. We also describe the remaining ground station integration tasks and operational procedures. Having developed a pragmatic COTS-based lasercom architecture for CubeSats, and having addressed the need for a compact laser transmitter and optical ne steering mechanisms with both analysis and experimental validation, this thesis has set the stage for the practical use of lasercom techniques in resource-constrained CubeSats which can yield order-of-magnitude enhancements in communications link eciency relative to existing RF technologies currently in use.
by Ryan W. Kingsbury.
Ph. D.

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Joshi, Harita. "Modulation for optical wireless communications". Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/55521/.

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Bandele, Jeremiah Oluwatosin. "Extended free-space optical communications". Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37961/.

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This thesis investigates the performance of free-space optical (FSO) communication systems in a turbulent atmosphere employing optical amplifiers (OAs) to extend transmission reach and wavelength-division multiplexing (WDM) to improve capacity. This system performance is considered in the presence of amplified spontaneous emission (ASE) noise, scintillation, beam spreading, atmospheric attenuation and interchannel crosstalk. In this work, the modulation scheme used is the on-off keying non-return-to-zero and the main performance metric employed is the average bit error rate (BER). Various performance evaluation methods are used to estimate system performance. Analysis of single link, cascaded OA and WDM FSO communication systems are given and the implications of using both adaptive (to channel state) and non-adaptive decision threshold schemes are analysed. The benefits of amplifier saturation, for example in the form of effective scintillation reduction when a non-adaptive decision threshold scheme is utilised at the receiver for different atmospheric turbulence regimes, are presented. Monte Carlo simulation techniques are used to model the probability distributions of system parameters such as the optical signal power, amplified spontaneous emission noise, optical signal to noise ratio and the average bit error rate due to scintillation. It is found that the performance of an adaptive decision threshold is superior to a non-adaptive decision threshold for both saturated and fixed gain preamplified receivers and the ability of a saturated gain OA to suppress scintillation is only meaningful for system performance when a non-adaptive decision threshold is used at the receiver. In a saturated gain preamplified system, the optimum non-adaptive decision threshold is investigated. An OA cascade can be successfully used to extend reach in FSO communication systems and specific system implementations are presented. The optimal cascade scheme with a non-adaptive receiver would use frequent low gain saturated amplification although this has a cost implication. Furthermore, a saturated gain amplified WDM FSO system with a non-adaptive decision threshold is superior to a non-amplified WDM FSO system with an adaptive decision threshold.

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Più fonti

Libri sul tema "Optical communications"

Gagliardi, Robert M. Optical communications. 2^a ed. New York: Wiley, 1995.

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Sibley, Martin. Optical Communications. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34359-0.

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Paradisi, Alberto, Rafael Carvalho Figueiredo, Andrea Chiuchiarelli e Eduardo de Souza Rosa, a cura di. Optical Communications. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97187-2.

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Sibley, M. J. N. Optical Communications. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13524-0.

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Sibley, M. J. N. Optical Communications. London: Palgrave Macmillan UK, 1990. http://dx.doi.org/10.1007/978-1-349-20718-3.

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Gagliardi, Robert M. Optical communications. Malabar, Fla: R.E. Krieger Pub. Co., 1988.

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Sibley, M. J. N. Optical communications. 2^a ed. Houndmills, Basingstoke: Macmillan, 1995.

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Lecoy, Pierre. Fiber-optic communications. London: ISTE, 2008.

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Kolimbiris, Harold. Fiber optics communications. Upper Saddle River, N.J: Pearson/Prentice Hall, 2004.

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Ghassemlooy, Z., W. Popoola e S. Rajbhandari. Optical Wireless Communications. Second edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/9781315151724.

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Capitoli di libri sul tema "Optical communications"

Renk, Karl F. "Optical Communications". In Basics of Laser Physics, 567–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23565-8_33.

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Renk, Karl F. "Optical Communications". In Basics of Laser Physics, 623–28. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50651-7_33.

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Weik, Martin H. "optical communications". In Computer Science and Communications Dictionary, 1160. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_12948.

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Sibley, M. J. N. "Optical Fibre". In Optical Communications, 6–75. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13524-0_2.

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Sibley, M. J. N. "Optical Transmitters". In Optical Communications, 76–152. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13524-0_3.

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Sibley, M. J. N. "Optical Fibre". In Optical Communications, 7–46. London: Palgrave Macmillan UK, 1990. http://dx.doi.org/10.1007/978-1-349-20718-3_2.

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Sibley, M. J. N. "Optical Transmitters". In Optical Communications, 47–67. London: Palgrave Macmillan UK, 1990. http://dx.doi.org/10.1007/978-1-349-20718-3_3.

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Sibley, Martin. "Optical Fibre". In Optical Communications, 9–78. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34359-0_2.

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Sibley, Martin. "Optical Transmitters". In Optical Communications, 79–152. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34359-0_3.

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Sibley, M. J. N. "Introduction". In Optical Communications, 1–5. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13524-0_1.

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Atti di convegni sul tema "Optical communications"

Wilson, Glenn, Mauricio Uribe, Sigurd Moe, Andreas Ellmauthaler, Kwang Suh, Mikko Jaaskelainen, Jeff Bush e James Dupree. "All-Optical Subsea Sensing and Communications". In Offshore Technology Conference. OTC, 2023. http://dx.doi.org/10.4043/32645-ms.

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Abstract Subsea control systems utilize electric and/or optical communication channels within subsea optical distribution systems for redundant, duplex telemetry between topside facilities and subsea control systems. Downhole fiber optic sensing (DFOS) systems utilize the same subsea optical distribution systems for establishing transmission paths between the same topside facilities and downhole sensing fibers. To date, subsea fiber optic control and sensing systems have been operated on independent subsea optical distribution systems. This redundancy introduces complexity and cost into the overall subsea optical distribution system required for subsea developments. We describe the systems that combine fiber optic communications for subsea control systems and downhole fiber optic sensing systems into the same subsea optical distribution system. This enables simultaneous operation of communications between the topsides and subsea control module, and the topside interrogation of multiple downhole fiber optic sensors while preserving dry-tree equivalent sensing performance.

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Deng, Qiuzhuo, Lu Zhang, Hongqi Zhang, Zuomin Yang, Xiaodan Pang, Vjačeslavs Bobrovs, Sergei Popov et al. "Quantum Noise Secured Terahertz Communications". In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.w2a.33.

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The quantum noise based terahertz signal encryption scheme is proposed, a 16 Gbits-1 secure terahertz communication system at 300 GHz with the optical communication realms is demonstrated, taking a significant step toward high-security wireless communications.

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Hacker, G. "Homodyne Detection for Optical Space Communications". In Coherent Laser Radar. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/clr.1987.thb1.

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Optical communication systems offer significant advantages over conventional microwave communications. They have the potential to provide high rate data links between satellites. Moving on to the optical frequency regime provides increased antenna gain with small congestion occuring in microwave communications. These properties and the high privacy due to the high directivity and small beam width make optical communications systems an ideal candidate for future intersatellite/interorbit data links.

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Park, Sung Min, e Yuriy Greshishchev. "Optical Communications". In 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. IEEE, 2007. http://dx.doi.org/10.1109/isscc.2007.373577.

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Masuda, S., H. Rokugawa, K. Yamaguchi, N. Fujimoto e S. Yamakoshi. "Architecture on Optical Processing for Communications". In Photonic Switching. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/phs.1989.sc286.

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Abstract (sommario):

We were able to achieve direct optical accessing from an optical highway using bistable laser diodes. A simple architecture was used without the need for optic to electric or electric to optic conversion for the optical switching.

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Mirasso, Claudio R., Ingo Fischer, Laurent Larger e Dimitris Syvridis. "“Chaotic Optical Communications”". In Frontiers in Optics. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/fio.2005.ftua6.

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Hodgkinson, T. G., D. W. Smith, Richard Wyatt e D. J. Malyon. "Coherent optical communications". In Optical Fiber Communication Conference. Washington, D.C.: OSA, 1985. http://dx.doi.org/10.1364/ofc.1985.mh1.

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Uchida, Teiji. "Coherent Optical Communications". In 20th European Microwave Conference, 1990. IEEE, 1990. http://dx.doi.org/10.1109/euma.1990.336176.

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Kanter, Gregory S. "Secure Optical Communications". In Conference on Lasers and Electro-Optics. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/cleo.2010.cfc3.

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Richardson, David J. "Optical Communications using Microstructured Optical Fibers". In CLEO: Science and Innovations. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/cleo_si.2016.sw4i.1.

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Rapporti di organizzazioni sul tema "Optical communications"

Haus, Joseph W., e Paul F. McManamon. Ladar and Optical Communications Institute (LOCI). Fort Belvoir, VA: Defense Technical Information Center, dicembre 2013. http://dx.doi.org/10.21236/ada591239.

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Andrews, L. C., R. L. Phillips, R. Crabbs, T. Leclerc e P. Sauer. Channel Characterization for Free-Space Optical Communications. Fort Belvoir, VA: Defense Technical Information Center, luglio 2012. http://dx.doi.org/10.21236/ada565323.

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Obarski, Gregory E. Wavelength measurement system for optical fiber communications. Gaithersburg, MD: National Bureau of Standards, 1990. http://dx.doi.org/10.6028/nist.tn.1336.

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Gosnell, T., Ping Xie e N. Cockroft. Optical-fiber laser amplifier for ultrahigh-speed communications. Office of Scientific and Technical Information (OSTI), aprile 1996. http://dx.doi.org/10.2172/231323.

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Adibi, Ali. Advanced Photonic Crystal-Based Integrated Structures for Optical Communications and Optical Signal Processing. Fort Belvoir, VA: Defense Technical Information Center, novembre 2010. http://dx.doi.org/10.21236/ada563400.

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Joyce, K. A. Low-Cost Pointing-and-Tracking System for Optical Communications (PATSOC). Fort Belvoir, VA: Defense Technical Information Center, giugno 1988. http://dx.doi.org/10.21236/ada202921.

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Herczfeld, Peter R. High Speed Optical Transmitter and Receiver Development for Lidar and Communications. Fort Belvoir, VA: Defense Technical Information Center, settembre 1999. http://dx.doi.org/10.21236/ada630365.

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Rabinovich, W. S., G. C. Gilbreath, Peter G. Goetz, R. Mahon, D. S. Kazter, K. Ikossi-Anasatasiou, S. Binari et al. InGaAs Multiple Quantum Well Modulating Retro-Reflector for Free Space Optical Communications. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2002. http://dx.doi.org/10.21236/ada461734.

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Brady, David J., James J. Coleman e Kenneth G. Purchase. Ultra-Fast Optical Signal Encoding and Analysis for Communications and Data Fusion Networks. Fort Belvoir, VA: Defense Technical Information Center, maggio 2000. http://dx.doi.org/10.21236/ada377846.

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Boroson, Don M. Optical Communications: A Compendium of Signal Formats, Receiver Architectures, Analysis Mathematics, and Performance Characteristics. Fort Belvoir, VA: Defense Technical Information Center, settembre 2005. http://dx.doi.org/10.21236/ada439968.

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