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Dissertations / Theses on the topic 'Free space optic'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Serb, Alexantrou. "Electro-optic platform for free space CMOS photonics." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/17825.

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Lab-on-chip (LOC) systems are becoming increasingly popular for biomedical science as they present the opportunity to combine compact and efficient microelectronics together with microfluidics enabling new applications in point-of-care diagnostics. This system integration however, poses significant challenges in the assembly of such devices for mass manufacture. Specifically, to achieve a robust fluidic isolation, an insulating material must be deposited to seal the chip and wire bonds but allow fluid to access the sensing surface. This is typically achieved by using an insulating epoxy for en

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2

Timus, Oguzhan. "Free space optic communication for Navy surface ship platforms." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FTimus.pdf.

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3

Perera, Janaka P. "A low-cost man-portable free-space optics communication device for Ethernet applications." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FPerera.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2004.<br>Thesis advisor(s): Gamani Karunasiri, Xiaoping Yun. Includes bibliographical references (p. 47-50). Also available online.

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4

Song, Yunbin. "Optical Communication Systems for Smart Dust." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34679.

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In this thesis, the optical communication systems for millimeter-scale sensing and communication devises known as "Smart Dust" are described and analyzed. A smart dust element is a self-contained sensing and communication system that can be combined into roughly a cubic-millimeter mote to perform integrated, massively distributed sensor networks. The suitable passive optical and fiber-optic communication systems will be selected for the further performance design and analysis based on the requirements for implementing these systems. Based on the communication link designs of the free-space

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5

ANDO', Andrea. "FREE SPACE OPTICS LINKS AFFECTED BY OPTICAL TURBULENCE: CHANNEL MODELING, MEASUREMENTS AND CODING TECHNIQUES FOR ERROR MITIGATION." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/90925.

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FSO is an optical wireless line-of-sight communication system able to offer good broadband performance, electromagnetic interference immunity, high security, license-free operation, low power consumption, ease of relocation, and straightforward installation. It represents a modern technology, significantly functional when it is impossible, expensive or complex to use physical connections or radio links. Unfortunately, since the transmission medium in a terrestrial FSO link is the air, these communications are strongly dependent on various atmospheric phenomena (e.g., rain, snow, optical turbul

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Polanský, David. "Koherence laserového svazku v turbulentní atmosféře." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219105.

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In the first part of the thesis discusses the function of the laser design and construction of its class. Here is an explanation of coherence and other properties of laser radiation. Listed below are the possibilities of energy distribution in the laser beam. Described in particular Gaussian beam. The paper explains the phenomena of bending and Young's experiment. The paper examines the influence of atmospheric environment in the transmission of electromagnetic waves, defined as light. Particular attention is devoted to atmospheric turbulence. In the second part are first discussed the possibi

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7

Tavares, Ana Cristina Maia. "GPON and video over free space optics." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11569.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>A procura por maiores larguras de banda nas redes de telecomunicações em curtos períodos de tempo tem crescido bastante. Mas tem-se verificado um desequilíbrio em termos de flexibilidade, eficácia e custo, uma vez que há zonas de difícil acesso, onde se torna caro levar uma fibra, e há ligações que podem ser apenas temporárias, outras de longo termo. É o chamado problema de “last mile bottleneck”. Uma das possibiblidades para ultrapassar estes obstáculos, é a utilização de uma tecnologia chamada óptica de meio livre (mais conhecida pela

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8

Neo, Soo Sim Daniel. "Free space optics communication for mobile military platforms." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FNeo.pdf.

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9

Nguyen, Trung Thanh. "Binary-coded modulation and applications in free-space optics." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/33145.

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Binary-coded modulation techniques such as bit-interleaved coded modulation (BICM) and multilevel coding (MLC) are pragmatic methods to achieve both high power and bandwidth efficiencies in digital communications. These techniques enable the combination of powerful and popular off-the-shelf binary codes with bandwidth-efficient multilevel signaling without considerable performance loss compared to joint coding and modulation designs. Today, binary-coded modulation has become almost universal in digital communication systems. This thesis concerns several aspects of binary-coded modulation an

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10

Reed, Martin. "The Free Space Radiation Mode method in integrated optics." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263413.

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11

Hammarström, Emil. "Network optimisation and topology control of Free Space Optics." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-124546.

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In communication networks today, the amount of users and traffic is constantly increasing. This results in the need for upgrading the networks to handle the demand. Free space optics is a technique which is relatively cheap with high capacity compared to most systems today. On the other hand, FSO have some disadvantages with the effects on the system by, for instance, turbulence and weather. The aim of the project is to investigate the use of network optimization for designing an optimal network in terms of capacity and cost. Routing optimization is also covered in terms of singlepath and mult

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Nordkvist, Tobias. "Network optimisation and topology control of Free Space Optics." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-130003.

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In communication networks today, the amount of users and traffic is constantly increasing. This results in the need for upgrading the networks to handle the demand. Free space optics, FSO, is a technique which is relatively cheap with high capacity compared to most systems today. On the other hand, FSO have some disadvantages with the effects on the system by, for instance, turbulence and weather. The aim of the project is to investigate the use of network optimization for designing an optimal network in terms of capacity and cost. Routing optimization is also covered in terms of singlepath an

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13

Barrett, Colin Paul. "Reconfigurable free-space optical interconnect systems." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/1330.

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14

Coleman, Christopher Lamar 1971. "Computer-generated holograms for free-space optical interconnects." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282593.

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This dissertation describes an investigation into the use of computer generated holograms to implement free-space optical interconnects. Computer generated holograms are discussed in terms of their theory of operation, design principles, fabrication techniques, optical performance, and sources of error. To motivate the research, discussion of an optoelectronic computing module is included; the device uses computer generated holograms to implement large-fanout optical interconnects. The emphasis of this dissertation is not on a specific application, rather it is focused on understanding the abi

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Lacroix, Frédéric 1973. "Design, analysis and implementation of free-space optical interconnects." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38072.

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Optical interconnects represent an attractive alternative technology for the implementation of dense, high-speed interconnects, as they do not suffer from many of the problems plaguing electrical interconnects such as frequency-dependent crosstalk and attenuation.<br>However, optics has still not been accepted commercially as an interconnect technology. There is concern regarding the cost and complexity of the optomechanics needed to achieve the very fine alignments necessary to guarantee that the light emitted from the source actually falls on the receiver. The demonstration of a simple-to-as

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Abadi, Mojtaba. "A hybrid free space optics/radio frequency antenna : design and evaluation." Thesis, Northumbria University, 2017. http://nrl.northumbria.ac.uk/36012/.

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Free space optical (FSO) communication provides high speed data communications with high flexibility and cost-effectiveness. However, FSO links are sensitive to atmospheric effects such as fog, smoke and turbulence. To address the problem, this research is investigating a hybrid FSO and RF technology to ensure link availability under all weather conditions as part of the last mile access networks. The research exclusively investigates design, implementation, and assessment of a novel dual purpose hybrid FSO/RF antenna. The technical issues are interference between FSO and RF parts; compactness

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17

Robertson, Brian. "Free-space holographic optical interconnects in dichromated gelatin." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1449.

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Boisset, Guillaume C. "Optomechanics and optical packaging for free-space optical interconnects." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34916.

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Free-space optical interconnects (FSOIs) promise to deliver tremendous gains in connectivity and architectural freedom in future computing systems, especially at the backplane level. However, a critical hurdle that must be overcome for FSOIs to deliver on their promise is that of optical packaging. The objective of optical packaging in FSOIs is to implement an optical design within the specified alignment budget and support the associated optoelectronics. It is a multidisciplinary field combining aspects of mechanical, optical and electrical engineering. This thesis explores optical packaging

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19

Capraro, Ivan. "Advanced Techniques in Free Space Quantum Communication." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425561.

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The main argument of this thesis is the application of advanced techniques for the optimization of single photon communication and in general of single photon applications. The work is inserted in the contest of various projects that involve the departments of Information Engineering and Astronomy of the University of Padua. In particular my contribution has been the development of a quantum cryptography setup that we called QuAKE. The system has been designed and implemented in our labs and include in the hardware some advanced temporal and spatial filtering techniques. These features has b

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St, Germain Kenneth W. "Shipboard radio frequency and free space optics communications system using an airborne relay." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FStGermain.pdf.

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Alrasheedi, Mohammad H. "A low-cost man-portable free-space optics communication device for ethernet applications." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FAlrasheedi.pdf.

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Reardon, Christopher P. "Free space optical interconnects for speckled computing." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/698.

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Stark, Thomas S. "Picosecond Dynamics of Free-Carrier Populations, Space-Charge Fields, and Photorefractive Nonlinearities in Zincblende Semiconductors." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc2202/.

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Generally, nonlinear optics studies investigate optically-induced changes in refraction or absorption, and their application to spectroscopy or device fabrication. The photorefractive effect is a nonlinear optical effect that occurs in solids, where transport of an optically-induced free-carrier population results in an internal space-charge field, which produces an index change via the linear electrooptic effect. The photorefractive effect has been widely studied for a variety of materials and device applications, mainly because it allows large index changes to be generated with laser beams h

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Gariano, John, and Ivan B. Djordjevic. "Multimode entanglement assisted QKD through a free-space maritime channel." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/626495.

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When using quantum key distribution (QKD), one of the trade-offs for security is that the generation rate of a secret key is typically very low. Recent works have shown that using a weak coherent source allows for higher secret key generation rates compared to an entangled photon source, when a channel with low loss is considered. In most cases, the system that is being studied is over a fiber-optic communication channel. Here a theoretical QKD system using the BB92 protocol and entangled photons over a free-space maritime channel with multiple spatial modes is presented. The entangled photons

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Ramsey, Darrel Lynn 1962. "Design and fabrication of a free space optical interconnect system using holographic optical elements." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/278521.

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This thesis presents the design, fabrication, and analysis of a board level free space interconnect system based on holographic optical elements. The interconnect scheme is implemented in a prototype with four fully interconnected transceiver modules. The design and fabrication procedure for the holographic optical elements is presented in detail. The impact of the electro-optical and electronic components on the system is analyzed and the performance of the integrated system is presented. Alternate components for future development such as diffractive binary lens arrays are discussed.

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Hashmi, Ali Javed. "Novel architectures for broadband free-space optical communications: deep-space and terrestrial optical links." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33992.

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The main objective of this research is to design, simulate, and evaluate telescope array-based receiver architectures for the inter-planetary optical communication links, which is able to provide broadband data support for future deep-space and universe exploration missions. The major aspects of this research are as follows: (1) evaluation and performance comparison of telescope arrays-based receiver with a large, monolithic telescope-based receiver, (2) mathematical modeling and analysis of the impact of various limiting factors (i.e., background noise, atmospheric turbulence, synchronization

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Dall'Arche, Alberto. "Advanced techniques for quantum communications in free-space channels." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424543.

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This thesis is focused on the development of advanced techniques for quantum communications in free-space channels. At present there are several demonstrations of quantum communication protocols at long distances, many of these exploit optical fiber as transmission channel. The optical fiber is very advantageous in that it is scarcely influenced by external conditions and allows to connect remote localities that are not in direct line of sight. On the other hand, it presents strong limitations in transmission distance because of dispersion and attenuation. It is therefore necessary to explor

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Levander, Fredrik, and Per Sakari. "Design and Analysis of an All-optical Free-space Communication Link." Thesis, Linköping University, Department of Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1198.

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<p>Free Space Optics (FSO) has received a great deal of attention lately both in the military and civilian information society due to its potentially high capacity, rapid deployment, portability and high security from deception and jamming. The main issue is that severe weather can have a detrimental impact on the performance, which may result in an inadequate availability. </p><p>This report contains a feasibility study for an all-optical free-space link intended for short-range communication (200-500 m). Laboratory tests have been performed to evaluate the link design. Field tests were made

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Sprague, John W. "Free space optics and wireless broadband radio frequency technology : bringing highspeed network access to the last mile." Thesis, Monterey, California. Naval Postgraduate School, 2002. http://hdl.handle.net/10945/6013.

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Approved for public release; distribution is unlimited<br>Existing copper phone and cable infrastructure no longer provide the required broadband for today's emerging applications. Homes and businesses in the "last mile" require the same access to broadband speeds available inside the fiber optic ring. It is not economically feasible, however, to bring fiber optic cable to each and every home and business in the "last mile." Free Space Optics and Wireless Broadband Radio Frequency are two technologies gaining popularity as an alternative broadband infrastructure. Free Space Optics uses lasers

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Didier, Pierre. "Novel mid-infrared quantum cascade devices for applications in free-space optics, data security and microwave photonics." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT029.

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Cette thèse de doctorat porte sur la transmission optique en espace libre (FSO) dans la région de l’infrarouge moyen couvrant trois aspects principaux : la transmission FSO à grande vitesse, la communication privée par synchronisation chaotique, et l’intégration de systèmes de communication FSO-RF. Dans le domaine de la transmission FSO à grande vitesse, cette recherche s’intéresse à différents schémas de modulation, de filtrage et d’équalization. Des dispositifs en cascade tels que les lasers en cascade interbande (ICL) et les lasers en cascade quantique (QCL) sont utilisés. Des débits de don

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Raible, Daniel Edward. "Free Space Optical Communications with High Intensity Laser Power Beaming." Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1313065631.

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Gouveia, Fahim. "Projeto de um transceptor óptico para comunicação digital em espaço livre." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-04072007-133531/.

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Os sistemas de comunicação óptica por espaço livre, comumente denominados sistemas FSO (Free Space Optics), servem para estabelecer enlaces de comunicação do tipo wireless, ponto-a-ponto, a uma elevada taxa de dados e com alcances que podem variar de algumas centenas de metros a alguns quilômetros. O interesse pela tecnologia FSO tem sido estimulado pela necessidade de se fornecer soluções complementares às tradicionais (e.g. fibra óptica e RF) visando a atender à crescente demanda por conexões de banda larga. Algumas de suas aplicações mais importantes são a conexão de redes locais de computa

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OSORIO, JOSE ALBERTO HUANACHIN. "SIMULATION AND DEVELOPMENT OF A FREE-SPACE OPTICS IN RIO DE JANEIRO AND RELATIONSHIP WITH ITU-T G.826." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7690@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Os sistemas de comunicações ópticas no espaço livre (Free Space Optics - FSO) tem sido desenvolvidos nos últimos anos no Brasil, contudo ha poucas referencias de estudos realizadas em território nacional. Neste tipo de sistema, um feixe de laser pode carregar informação de um ponto para outro através de uma distância curta (3-4 km), evitando-se o uso das fibras ópticas. Por tanto, FSO tornou-se uma alternativa rápida e muito econômica, principalmente nas áreas urbanas. Este trabalho apresenta um procedimento para a análi

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Al-Musawi, Hassan. "The design of Radio-over-Fibre (RoF) and Free Space Optics (RoFSO) systems for the indoor and outdoor building networks." Thesis, Northumbria University, 2017. http://nrl.northumbria.ac.uk/33343/.

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The 4th generation- long term evolution (4G-LTE) mobile technology is widely adopted that offer both higher capacity and efficient bandwidth usage at a global level. However, considering that in cellular networks the major data traffic mostly occurs indoor, providing high quality can be a daunting task. 4G-LTE provides strong support for both outdoor and indoor coverage by adopting enhanced NodeB (eNB) and home eNB (HeNB), respectively. This research work presents (i) a single-mode filtering technique (SMFT) as a simple design, low cost scheme to degrade the dispersion behaviour of the hybrid

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Gummalla, Srikanth. "Design and Implementation of an Optical Tag Reader." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1229447375.

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Wayne, David. "THE PDF OF IRRADIANCE FOR A FREE-SPACE OPTICAL COMMUNICATIONS CHANNEL: A PHYSICS BASED MODEL." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3812.

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An accurate PDF of irradiance for a FSO channel is important when designing a laser radar, active laser imaging, or a communications system to operate over the channel. Parameters such as detector threshold level, probability of detection, mean fade time, number of fades, BER, and SNR are derived from the PDF and determine the design constraints of the receiver, transmitter, and corresponding electronics. Current PDF models of irradiance, such as the Gamma-Gamma, do not fully capture the effect of aperture averaging; a reduction in scintillation as the diameter of the collecting optic is incre

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Kumar, Kuldeep. "Pulse Position Modulation using BICM-ID for FSO Channels." International Foundation for Telemetering, 2013. http://hdl.handle.net/10150/579510.

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ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV<br>We investigate pulse position modulation (PPM) and multipulse PPM (MPPM) for free space op- tical channels using bit interleaved coded modulation with iterative decoding. Data bits are first encoded by using a non recursive convolutional code and the coded bits after an interleaver are modulated before transmission. Iterative decoding is performed at the receiver. Optimized mapping is designed for

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Leonhard, Nina [Verfasser], Herbert [Gutachter] Gross, Alexander [Gutachter] Szameit, and Rupert [Gutachter] Ursin. "Adaptive optics for free-space communication with entangled orbital angular momentum photons / Nina Leonhard ; Gutachter: Herbert Gross, Alexander Szameit, Rupert Ursin." Jena : Friedrich-Schiller-Universität Jena, 2019. http://d-nb.info/1207155985/34.

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Turghun, Matniyaz. "Free-space NPR mode locked erbrium doped fiber laser based frequency comb for optical frequency measurement." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18682.

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Master of Science<br>Department of Physics<br>Brian R. Washburn<br>This thesis reports our attempt towards achieving a phase stabilized free-space nonlinear polarization rotation (NPR) mode locked erbium doped fiber laser frequency comb system. Optical frequency combs generated by mode-locked femtosecond fiber lasers are vital tools for ultra-precision frequency metrology and molecular spectroscopy. However, the comb bandwidth and average output power become the two main limiting elements in the application of femtosecond optical frequency combs. We have specifically investigated the free-spa

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Gherardi, David Mark. "Studies of particle and atom manipulation using free space light beams and photonic crystal fibres." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/703.

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Lees, Eitan Jacob. "Suppression of Collective Quantum Jumps of Rydberg Atoms due to Collective Spontaneous Emission from Atoms in Free Space." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438276591.

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Nahar, Niru Kamrun. "Photonic Crystal Fibers and Optical True Time Delay Engines for Wideband Arrays." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213624105.

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Champion, Theresa Fiona Maya. "Towards storage and retrieval of non-classical light in a broadband quantum memory : an investigation of free-space and cavity Raman memories." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:6681110d-ccdb-4960-93be-cf1fbac4e0ec.

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Photonic quantum information processing has emerged as a powerful platform for realising quantum-enhanced technologies. In order to be scalable, many of these technologies depend on the availability of a suitable quantum memory for the coherent storage and on-demand retrieval of photonic quantum states. In this thesis, I investigate broadband light storage in a room-temperature Raman memory, implemented both in free space and, for the first time, inside a low-finesse optical cavity designed for low-noise operation. The ability of the Raman memory to preserve phase coherence was tested by stori

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Detofsky, Abram Maximilian. "A multi-wavelength optical content-addressable parallel processor (MW-OCAPP) for high-speed relational database processing: Free-space experimental implementation and monolithic adaptation based on guided-wave technology." Thesis, The University of Arizona, 1999. http://hdl.handle.net/10150/291970.

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This thesis explores the five-space experimental implementation and monolithic adaptation of the Equality subsystem from a parallel relational database optical machine called the Multi-Wavelength Optical Content-Addressable Parallel Processor (MW-OCAPP). MW-OCAPP uses a novel polarization- and wavelength-encoding scheme to achieve an input/output-limited experimental peak bit comparison rate of 96,000/sec. Recognizing the severe diffraction-limit penalty for using a free-space optical processor with relatively long path lengths, a system based on guided-wave optics called the Equivalency Proce

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Valero, Marcos E. "Comparative Analysis of Atmospheric Turbulence-induced Laser Power Fluctuations in a Monolithic and Tiled Optical Receiver System." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1616587433479341.

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Al-Dabbagh, Rasha Khalid Mohammed. "A photonic generation and transmission system for millimetre-wave futuristic communications." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16249.

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In this thesis, a fully millimetre-wave (mm-wave) generation and transmission system is proposed for futuristic communications. Significant challenges have been dealt with regarding the proposed system, including designing the mm-wave generation and transmission technique, and its application in cellular networks. These challenges are presented through five main contributions and validated via Optiwave Design Software and MATLAB simulation tools. Firstly, three novel photonic generation methods are proposed and designed based on the characteristics of Brillouin fibre laser and the Stimulated B

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Lucas, Yann. "Integrated adaptive optics for atmospheric turbulence effects mitigation on optical links." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP172.

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Avec un besoin croissant de communication en espace libre, les transmissions radiofréquences deviennent saturées et les liaisons optiques représentent une solution prometteuse. A la réception, l'injection du signal optique dans une fibre optique monomode (FOM) permet un débit élevé en utilisant les composants déjà développés pour les communications fibrées. Cette injection peut être fortement perturbée par les effets de la turbulence pour des liens à travers l'atmosphère. Pour s'affranchir de ces effets, l'optique adaptative (OA) est couramment utilisée. Une approche alternative, appelée ici O

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48

Kočvara, Pavel. "Měření mechanické stability budov a stožárů využívaných pro FSO spoje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221236.

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The Master's thesis deals with the determination of measurement method of deflection the axis of the optical beam from its ideal position, which is caused by action of force of strong winds affecting the positional stability of the building or supporting structure (tower) used for placement of FSO links'heads. The thesis informs the readers about the other causes of deflection of beam axis in a real environment, about methods of determining the position of the beam axis in the plane perpendicular to the beam axis and the basic properties and parameters of the Gauss beams, including the phenome

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49

Narváez, Castañeda Emmanuel. "Elliptical Vortex Beams Through Turbulent Atmosphere." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1608232137775185.

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50

Pučálka, Jan. "Vysokorychlostní optický spoj pro krátké vzdálenosti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219988.

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The diploma thesis deals with description and design of a low-cost free-space optical (FSO) link. First, general FSO theory is discussed including their common parameters, properties and topologies. Further, optical signal sources and detectors are proposed. Finally, the selected implementation is described including its design and realization. The proposed FSO consists of two identical segments (modules) to form a full-duplex link. The FSO utilizes LED as a light source, maximum speed data rate is 100 Mb/s with 100Base-TX interface.

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