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Articoli di riviste sul tema "Optics"

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Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 7 luglio 2024

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1

Masalov, Anatolii V. "Progress in Optics: encyclopedia of modern optics". Uspekhi Fizicheskih Nauk 174, n. 1 (2004): 110. http://dx.doi.org/10.3367/ufnr.0174.200401h.0110.

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2

Andersson, P. O., A. Persson, L. Thyléen e G. Edwall. "Fibre optic interferometer using integrated optics". Electronics Letters 21, n. 6 (1985): 245. http://dx.doi.org/10.1049/el:19850175.

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3

Yanuary, Tio Hanif, e Lita Lidyawati. "Analisis Link Budget Penyambungan Serat Optik Menggunakan Optical Time Domain Reflectometer AQ7275". Jurnal Teknik Elektro 10, n. 1 (20 giugno 2018): 36–40. http://dx.doi.org/10.15294/jte.v10i1.13996.

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Abstract (sommario):
An optical fiber is a high-speed telecommunication transmission medium. Principally, an optical fiber is made of a very fine glass fiber material, which is able to transmit light waves using light reflection method on the surface of the fiber optics core. An underground installation of the fiber optics makes this device robust from external interferences. However, the fiber optic cable performance should always be checked to maintain performance during data transmission process. One way to test fiber optics cable performance is by using an Optical Time - Domain Reflectometer (OTDR) device. This device sends a light wave from one point of the fiber optics cable. The light wave then returns when reaching the other point of the fiber optic cable while carrying some measurement parameters especially the physical length and attenuation of a fiber optic cable. The evaluation of the fiber optics cable performance requires the preparation, installation, and configuration of the OTDR. In this paper, we conducted evaluation on the performances of fiber optics cable. The data generated by the performed evaluation indicated an occurring attenuation on the fiber optics cable along 64.402 km of its lengths.
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4

Sieradzan, Andrzej. "Teaching geometrical optics with the ‘‘optic mirage’’". Physics Teacher 28, n. 8 (novembre 1990): 534–36. http://dx.doi.org/10.1119/1.2343139.

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5

Steier, William H., Antao Chen, Sang-Shin Lee, Sean Garner, Hua Zhang, Vadim Chuyanov, Larry R. Dalton et al. "Polymer electro-optic devices for integrated optics". Chemical Physics 245, n. 1-3 (luglio 1999): 487–506. http://dx.doi.org/10.1016/s0301-0104(99)00042-7.

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6

Nikolov, Daniel K., Aaron Bauer, Fei Cheng, Hitoshi Kato, A. Nick Vamivakas e Jannick P. Rolland. "Metaform optics: Bridging nanophotonics and freeform optics". Science Advances 7, n. 18 (aprile 2021): eabe5112. http://dx.doi.org/10.1126/sciadv.abe5112.

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The demand for high-resolution optical systems with a compact form factor, such as augmented reality displays, sensors, and mobile cameras, requires creating new optical component architectures. Advances in the design and fabrication of freeform optics and metasurfaces make them potential solutions to address the previous needs. Here, we introduce the concept of a metaform—an optical surface that integrates the combined benefits of a freeform optic and a metasurface into a single optical component. We experimentally realized a miniature imager using a metaform mirror. The mirror is fabricated via an enhanced electron beam lithography process on a freeform substrate. The design degrees of freedom enabled by a metaform will support a new generation of optical systems.
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7

Pârvulescu, Cǎtǎlin Corneliu, Elena Manea, Cǎtǎlin Tibeica, Munizer Purica e Alina Popescu. "Design and Fabrication of the Bidirectional Micro-Optic Concentrator for Optical Radiation". Defect and Diffusion Forum 400 (marzo 2020): 21–31. http://dx.doi.org/10.4028/www.scientific.net/ddf.400.21.

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This paper presents the design and fabrication of a micro-optic concentrator for optical radiation based on coupled micro-lenses and micro-prism (micro – mirrors) arrays. This type of micro-optic concentrator is suitable for both terrestrial and spatial applications where optical radiation is redirected and coupled to small area photovoltaic cells or detection devices located in front of the waveguide edges. Analysis and design were performed for the 0.4-1.06µm spectral range using the COMSOL Multiphysics program and the Ray Optics geometric optics module. Simulations for ray-tracing have been modeled in order to optimize the geometries of micro-optics elements taking into account the optical parameters of the materials to be used (polymers and glass) in the process of micro-optic concentrator fabrication. Micro-lenses and micro-prism arrays were fabricated by the technique of molding in silicon molds and replication in polymeric materials using OrmoClear30 elastomer (n=1.56, UV exposure) and in UV-PDMS, KER4690 polymer, respectively. Assembling and the fabrication process of micro-optic concentrator allowed the achievement of an optical efficiency of 70 % efficiency.
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8

Mulyanto, Imam. "Analysis of Curvature in Fiber Optic Cable for Macrobending-Based Slope Sensor". Journal of Technomaterials Physics 3, n. 1 (26 febbraio 2021): 45–56. http://dx.doi.org/10.32734/jotp.v3i1.5540.

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The analysis of fiber optics for macro bending-based slope sensors using SMF-28 single-mode optical fibers has been successfully conducted. Fiber optics were treated to silicon rubber molding and connected with laser light and power meters to measure the intensity of laser power generated. The working principle was carried out using the macrobending phenomenon on single-mode optical fibers. The intensity of laser light in fiber optic cables decreases in the event of indentation or bending of the fiber optic cable. Power losses resulting from the macrobending process can be seen in the result of the information sensitivity of fiber optics to the change of angle given. From the results of the study, the resulting fiber optic sensitivity value is -0.1534o/dBm. The larger the angle given, the lower the laser intensity received by the power meter.
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9

HOTATE, Kazuo. "Special Issue on Fiber-Optics. Fiber Optic Gyros." Review of Laser Engineering 22, n. 4 (1994): 253–64. http://dx.doi.org/10.2184/lsj.22.253.

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10

Shiono, Teruhiro, e Hisahito Ogawa. "Planar-optic-disk pickup with diffractive micro-optics". Applied Optics 33, n. 31 (1 novembre 1994): 7350. http://dx.doi.org/10.1364/ao.33.007350.

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11

Simara Azizova, Simara Azizova. "FIBER OPTIC SENSORS". PIRETC-Proceeding of The International Research Education & Training Centre 23, n. 02 (19 aprile 2023): 94–100. http://dx.doi.org/10.36962/piretc23022023-94.

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In addition to the benefits, recent developments and cost reductions have sparked interest in fiber optical sensing. In order fiber optic sensors must be made, researchers integrated optoelectronic devices with fiber optic telecommunications' byproducts. In the past few decades, numerous studies using various research methods and fiber optic sensors have been carried out. The most popular sensor types for fiber optics are those based on intensity, phase, and wavelength. An overview of optic sensors and their uses is provided in this paper. Keywords: Fiber optics, smart systems, interferometry, microbending, and fiber Bragg gratings (FBGs)
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12

Albert, D. M. "Lectiones Opticae XVIII: Eighteen Lectures on Optics". Archives of Ophthalmology 105, n. 10 (1 ottobre 1987): 1333. http://dx.doi.org/10.1001/archopht.1987.01060100035019.

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13

Wu, Xiaoqin, e Limin Tong. "Optical microfibers and nanofibers". Nanophotonics 2, n. 5-6 (16 dicembre 2013): 407–28. http://dx.doi.org/10.1515/nanoph-2013-0033.

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AbstractAs a combination of fiber optics and nanotechnology, optical microfibers and nanofibers (MNFs) have been emerging as a novel platform for exploring fiber-optic technology on the micro/nanoscale. Typically, MNFs taper drawn from glass optical fibers or bulk glasses show excellent surface smoothness, high homogeneity in diameter and integrity, which bestows these tiny optical fibers with low waveguiding losses and outstanding mechanical properties. Benefitting from their wavelength- or sub-wavelength-scale transverse dimensions, waveguiding MNFs exhibit a number of interesting properties, including tight optical confinement, strong evanescent fields, evident surface field enhancement and large and abnormal waveguide dispersion, which makes them ideal nanowaveguides for coherently manipulating light, and connecting fiber optics with near-field optics, nonlinear optics, plasmonics, quantum optics and optomechanics on the wavelength- or sub-wavelength scale. Based on optical MNFs, a variety of technological applications, ranging from passive micro-couplers and resonators, to active devices such as lasers and optical sensors, have been reported in recent years. This review is intended to provide an up-to-date introduction to the fabrication, characterization and applications of optical MNFs, with emphasis on recent progress in our research group. Starting from a brief introduction of fabrication techniques for physical drawing glass MNFs in Section 2, we summarize MNF optics including waveguiding modes, evanescent coupling, and bending loss of MNFs in Section 3. In Section 4, starting from a “MNF tree” that summarizes the applications of MNFs into 5 categories (waveguide & near field optics, nonlinear optics, plasmonics, quantum & atom optics, optomechanics), we go to details of typical technological applications of MNFs, including optical couplers, interferometers, gratings, resonators, lasers and sensors. Finally in Section 5 we present a brief summary of optical MNFs regarding their current challenges and future opportunities.
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14

Rahmatian, Farnoosh, Hiroshi Kato, Nicolas A. F. Jaeger, Robert James e Ezio Berolo. "Slow-wave electrodes on GaAs for integrated electro-optic modulators". Canadian Journal of Physics 74, S1 (1 dicembre 1996): 35–38. http://dx.doi.org/10.1139/p96-828.

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Slow-wave electrodes that are suitable for use in integrated-optics, electro-optic modulators were fabricated and tested. Measurements of the microwave indices on a number of these electrodes show that sufficient slowing can be obtained to match the velocities of modulating microwaves to optical waves in graded-index AlxGa1−xAs waveguides for a wide range of mole fraction, x. Calculations based on the measured losses, for integrated-optics, electro-optic modulators in which the velocity-match condition has been achieved, indicate that devices having optical bandwidths >100 GHz should be possible using the electrodes presented.
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15

S. Kavitha. "An Overview of Free Space Optics Communication System". December 2022 4, n. 4 (10 novembre 2022): 222–29. http://dx.doi.org/10.36548/jsws.2022.4.001.

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Free space optics is a kind of broadband communication technique that transmits the signals, in the atmosphere through laser beams. In some cases, the laser beams are replaced with infrared and modified beams. Free Space Optics (FSO) is also referred as Free Space Photonics that works same as the principle of fiber optic communication where the source beams are transferred through air medium. In the traditional fiber optic communication, the optical fibers were used for transferring the beam signals. The FSO methodology is widely employed in various ubiquitous applications for their cost and deployment effectiveness. The motive of the work is to explore the concepts and theories behind the operation of different FSO models with their recent progress.
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16

Duarte, F. J. "Tunable laser optics: Applications to optics and quantum optics". Progress in Quantum Electronics 37, n. 6 (novembre 2013): 326–47. http://dx.doi.org/10.1016/j.pquantelec.2013.09.001.

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17

Moslehi, Behzad, Joel Ng, Ivan Kasimoff e Tomasz Jannson. "Fiber-optic coupling based on nonimaging expanded-beam optics". Optics Letters 14, n. 23 (1 dicembre 1989): 1327. http://dx.doi.org/10.1364/ol.14.001327.

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18

DiGiovanni, David J., Ming-Jun Li e Alan E. Willner. "Fiber optic nanotechnology: a new frontier of fiber optics". Nanophotonics 2, n. 5-6 (16 dicembre 2013): 311–13. http://dx.doi.org/10.1515/nanoph-2013-0053.

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19

Holman, Robert L., Lynda M. Althouse Johnson e Doyle P. Skinner. "Desirability Of Electro-Optic Materials For Guided-Wave Optics". Optical Engineering 26, n. 2 (1 febbraio 1987): 262134. http://dx.doi.org/10.1117/12.7974039.

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20

Lalanne, Philippe, e Eric Johnson. "Diffractive Optics and Micro-optics". Journal of the Optical Society of America A 23, n. 1 (1 gennaio 2006): 152. http://dx.doi.org/10.1364/josaa.23.000152.

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21

Mait, Joseph N., e Hans Peter Herzig. "Diffractive Optics and Micro-optics". Journal of the Optical Society of America A 18, n. 11 (1 novembre 2001): 2862. http://dx.doi.org/10.1364/josaa.18.002862.

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22

Murphy, P. J., D. W. Jones, A. E. Lennert e R. R. Jones. "Fiber Optics Based Jet Engine Augmenter Viewing System". Journal of Engineering for Gas Turbines and Power 111, n. 2 (1 aprile 1989): 306–9. http://dx.doi.org/10.1115/1.3240252.

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An augmenter viewing system employing a coherent fiber-optic array was developed for use in jet engine testing applications at AEDC. Real-time viewing of the test article afterburner was obtained in a severe environment under high temperature and vibration levels. The optical system consisted of a conventional front-end lens assembly coupled with the fiber-optic array, and a solid-state color video camera mounted inside the test cell. The advantages and problems associated with a fiber-optics-based viewing system will be discussed in comparison with more conventional viewing techniques for this application.
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23

Renna, Marco, Adriano Peruch, John Sunwoo, Zachary Starkweather, Alyssa Martin e Maria Angela Franceschini. "A Contact-Sensitive Probe for Biomedical Optics". Sensors 22, n. 6 (18 marzo 2022): 2361. http://dx.doi.org/10.3390/s22062361.

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Capacitive proximity sensing is widespread in our everyday life, but no sensor for biomedical optics takes advantage of this technology to monitor the probe attachment to the subject’s skin. In particular, when using optical monitoring devices, the capability to quantitatively measure the probe contact can significantly improve data quality and ensure the subject’s safety. We present a custom novel optical probe based on a flexible printed circuit board which integrates a capacitive contact sensor, 3D-printed optic fiber holders and an accelerometer sensor. The device can be effectively adopted during continuous monitoring optical measurements to detect contact quality, motion artifacts, probe detachment and ensure optimal signal quality.
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24

SHAN, JIE, AJAY NAHATA e TONY F. HEINZ. "TERAHERTZ TIME-DOMAIN SPECTROSCOPY BASED ON NONLINEAR OPTICS". Journal of Nonlinear Optical Physics & Materials 11, n. 01 (marzo 2002): 31–48. http://dx.doi.org/10.1142/s0218863502000845.

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We present a brief review of the use of nonlinear optics for broadband terahertz (THz) time-domain spectroscopy with femtosecond laser pulses. The generation of THz pulses is accomplished by optical rectification and coherent detection by electro-optic sampling or field-induced second-harmonic generation. The approach permits exceptional time response, as well as the possibility for multichannel detection schemes.
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25

Neher, Jon O. "Optics". Evidence-Based Practice 25, n. 7 (luglio 2022): 1. http://dx.doi.org/10.1097/ebp.0000000000001712.

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26

Ankerst, Mihael, Markus M. Breunig, Hans-Peter Kriegel e Jörg Sander. "OPTICS". ACM SIGMOD Record 28, n. 2 (giugno 1999): 49–60. http://dx.doi.org/10.1145/304181.304187.

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27

Long, William F. "OPTICS". Optometry and Vision Science 68, n. 5 (maggio 1991): 393–94. http://dx.doi.org/10.1097/00006324-199105000-00015.

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28

Remole, Arnulf. "OPTICS". Optometry and Vision Science 68, n. 10 (ottobre 1991): 824–25. http://dx.doi.org/10.1097/00006324-199110000-00016.

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29

Granet, Roger. "OPTICS". Palliative and Supportive Care 8, n. 3 (settembre 2010): 383. http://dx.doi.org/10.1017/s1478951510000210.

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30

Sillitto, R. M. "Optics". Journal of Modern Optics 34, n. 11 (novembre 1987): 1399–400. http://dx.doi.org/10.1080/09500348714551301.

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31

Sillitto, R. M. "Optics". Journal of Modern Optics 34, n. 12 (dicembre 1987): 1511–12. http://dx.doi.org/10.1080/09500348714551431.

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32

Knight, P. L. "Optics". Journal of Modern Optics 35, n. 11 (novembre 1988): 1737. http://dx.doi.org/10.1080/09500348814551881.

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33

Baker, L. R. "Optics". Journal of Modern Optics 36, n. 3 (marzo 1989): 417. http://dx.doi.org/10.1080/09500348914550471.

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34

Winkler, Daniel A., Miguel Á. Carreira-Perpiñán e Alberto E. Cerpa. "OPTICS". ACM Transactions on Sensor Networks 16, n. 3 (14 agosto 2020): 1–38. http://dx.doi.org/10.1145/3372024.

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35

Walker, C. A. "Optics". Optics and Lasers in Engineering 11, n. 3 (gennaio 1989): 219. http://dx.doi.org/10.1016/0143-8166(89)90033-x.

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36

Halliwell, N. A. "Optics". Optics and Lasers in Engineering 10, n. 1 (gennaio 1989): 74. http://dx.doi.org/10.1016/0143-8166(89)90055-9.

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37

Ohta, H., E. Kulatov, J. S. Dodge, Yu Uspenskii e S. Halilov. "OPTICS AND MAGNETO-OPTICS OF SrRuO3". Journal of the Magnetics Society of Japan 22, S_2_MORIS_97 (1998): S2_185–188. http://dx.doi.org/10.3379/jmsjmag.22.s2_185.

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38

Gale, Michael T. "Replicated Diffractive Optics and Micro-Optics". Optics and Photonics News 14, n. 8 (1 agosto 2003): 24. http://dx.doi.org/10.1364/opn.14.8.000024.

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39

Magnusson, Robert, e Daniel Raguin. "Diffractive optics and micro-optics: introduction". Applied Optics 45, n. 1 (1 gennaio 2006): 14. http://dx.doi.org/10.1364/ao.45.000014.

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40

Moharam, M. G., Allen Cox e Juergen Jahns. "Diffractive Optics and Micro-Optics Modeling". Journal of the Optical Society of America A 14, n. 7 (1 luglio 1997): 136. http://dx.doi.org/10.1364/josaa.14.000136.

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41

Reim, W., J. Schoenes e F. Hulliger. "Optics and magneto-optics of UAsSe". Physica B+C 130, n. 1-3 (maggio 1985): 64–65. http://dx.doi.org/10.1016/0378-4363(85)90185-8.

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42

OKAMOTO, Kazuhiro. "Special Issue on Fiber-Optics. Fiber-Optic Distributed-Temperature Sensing." Review of Laser Engineering 22, n. 4 (1994): 276–83. http://dx.doi.org/10.2184/lsj.22.276.

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43

Zenteno, L. A. "Design of a magneto-optic slab isolator for integrated optics". Optics Letters 12, n. 9 (1 settembre 1987): 657. http://dx.doi.org/10.1364/ol.12.000657.

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44

Eghbal, Mina, e Jamshid Abouei. "Security Enhancement in Free-Space Optics Using Acousto-Optic Deflectors". Journal of Optical Communications and Networking 6, n. 8 (22 luglio 2014): 684. http://dx.doi.org/10.1364/jocn.6.000684.

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45

Hunter, Boyd V., e Keng H. Leong. "Improving fiber-optic laser beam delivery by incorporating GRADIUM optics". Applied Optics 36, n. 13 (1 maggio 1997): 2763. http://dx.doi.org/10.1364/ao.36.002763.

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46

Hbeeb, Sadeq. "Estimation of analytical model for enhancement and implementation of an electro-optic switch". Iraqi Journal for Electrical and Electronic Engineering 13, n. 2 (1 dicembre 2017): 166–72. http://dx.doi.org/10.37917/ijeee.13.2.3.

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This research presents a technique of an electro optic effect for enhancement the an accomplishment of an electro optics switch using Mat lab simulation program . this technique includes design a mathematical model for evaluate the effect of different parameters such as refractive index (n), distance of separation between waveguides (d), length of electrodes (L), relative refractive index (Δn), and switching voltage (V), on the DC bias voltage of an electro optics switch. In this work the investigation of performance of an electro optics switch by analysis of an effect of distance between waveguides and the changing of refractive index on the bias voltage (V), and which optimizes when the wavelength is from 1300 into 1550 nm. Finally, an electro-optic active switch is designed and optimized, using the analytical model and which considers important device in the modern optical communication system.
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47

Mishra, Rashmi Rekha, e Karmila Soren. "Optical BPSK Modulation and Demodulation using Opti System Simulator". International Journal of Inventive Engineering and Sciences 9, n. 1 (30 dicembre 2021): 1–4. http://dx.doi.org/10.35940/ijies.c1045.129121.

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Fibre optics deals with study of propagation of light through transparent dielectric waveguides. The fibre optics is used for transmission of data from point to point location. Fibre optic systems currently used are most extensively as the transmission line between terrestrial hardwired systems. The carrier frequencies used in conventional systems had the limitations in handling the volume and rate of the data transmission. Greater the carrier frequency larger is the available bandwidth and information carrying capacity. This paper explains about Optical BPSK, where input data is converted to BPSK data which is optically modulated by optical modulator and transmitted through an optical fibre cable. The transmitted data and received data are compared in the end.
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48

Garmire, Elsa. "Stimulated Brillouin Review: Invented 50 Years Ago and Applied Today". International Journal of Optics 2018 (2 dicembre 2018): 1–17. http://dx.doi.org/10.1155/2018/2459501.

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Stimulated Brillouin scattering (SBS) is embedded today in a variety of optical systems, such as advanced high-power lasers, sensors, microwave signal processors, scientific instrumentation, and optomechanical systems. Reduction in SBS power requirements involves use of optical fibers, integrated optics, micro-optic devices, and now nano-optics, often in high Q cavities. It has taken fifty years from its earliest invention by conceptual discovery until today for SBS to become a practical and useful technology in a variety of applications. Some of these applications are explained and it is shown how they are tied to particular attributes of SBS: phase conjugation, frequency shifts, low noise, narrow linewidth, frequency combs, optical and microwave signal processing, etc.
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49

Ritou, Arnaud, Olivier Raccurt, Philippe Voarino, Pierre Besson e Mathieu Baudrit. "A Tool to Characterize the Electrical Influence of the Thermal and Mechanical Behaviors of Materials of Optics for CPV applications". MRS Advances 2, n. 53 (2017): 3123–28. http://dx.doi.org/10.1557/adv.2017.463.

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ABSTRACTConcentrating Photovoltaics (CPV) field aims to integrate expensive high efficiency multi-junction cells into modules with low cost concentrating optics. The choice of the optics depends on different factors: easiness of fabrication and integration process, added costs, optical efficiency and the profile of the spot uniformity reaching the cell. Indeed, previous work has shown a dependence between electrical performance and spectral and spatial uniformities of the light on the cell. To analyze it, a solar CPV test bench is developed at CEA-INES facilities. Lens and cell temperature can be applied separately, in order to evaluate independently different test conditions, while electrical or optical parameters are recorded. The present work shows how temperature and mechanical variations on first stage concentrating optic affects module performances. Several optics and materials are compared, in order to present the tool capabilities.
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50

Jumper, Eric J. "Special Section Guest Editorial: Aero-Optics and Adaptive Optics for Aero-Optics". Optical Engineering 52, n. 7 (15 aprile 2013): 071401. http://dx.doi.org/10.1117/1.oe.52.7.071401.

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