Готові списки джерел за темами / Optical switche

Добірка наукової літератури з теми "Optical switche"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Optical switche"

1

Fan, Xinxin, Xiuguo Chen, Hongmei Yan, and Jianbing Wang. "Design of an 8X8 Optical Matrix Protection Device based on Electric Power Communication Network." Journal of Physics: Conference Series 2083, no. 2 (November 1, 2021): 022062. http://dx.doi.org/10.1088/1742-6596/2083/2/022062.

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Анотація:
Abstract In order to realize the fast establishment of power fiber circuitous channels, the reliability of power communication optical cable network is guaranteed. An optical matrix 8X8 protection device is designed by using all-optical switcher. The test results show that at the end of each input light path, any 8 paths can be switched, it can achieve 1:8 protection switch, realized the arbitrary switching of three modes and has the function of remote fiber route scheduling.
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2

Wang, Cong, Lingfeng Gao, Hualong Chen, Yiquan Xu, Chunyang Ma, Haizi Yao, Yufeng Song, and Han Zhang. "Broadband and ultrafast all-optical switching based on transition metal carbide." Nanophotonics 10, no. 10 (June 25, 2021): 2617–23. http://dx.doi.org/10.1515/nanoph-2021-0066.

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Abstract Ultrafast all-optical switches have attracted considerable attention for breaking through the speed limitation of electric devices. However, ultrafast and high-efficiency all-optical switches based on two-dimensional (2D) materials can be achieved due to their strong nonlinear optical response and ultrafast carrier dynamic. For this reason, we propose the pump-probe method to achieve an ultrafast optical switcher with a response time of 192 fs and a switching energy of 800 nJ by using transition metal carbide (Nb2C). The response time and switching energy are far smaller than that of the all-optical device based on the saturable absorption effect of 2D materials. It is believed that the Nb2C-based all-optical switch provides a novel idea to achieve a high-performance all-optical device and has the potential for application in high-speed photonics processing.
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3

Rahman, Rahnuma, and Supriyo Bandyopadhyay. "The Cost of Energy-Efficiency in Digital Hardware: The Trade-Off between Energy Dissipation, Energy–Delay Product and Reliability in Electronic, Magnetic and Optical Binary Switches." Applied Sciences 11, no. 12 (June 17, 2021): 5590. http://dx.doi.org/10.3390/app11125590.

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Анотація:
Binary switches, which are the primitive units of all digital computing and information processing hardware, are usually benchmarked on the basis of their ‘energy–delay product’, which is the product of the energy dissipated in completing the switching action and the time it takes to complete that action. The lower the energy–delay product, the better the switch (supposedly). This approach ignores the fact that lower energy dissipation and faster switching usually come at the cost of poorer reliability (i.e., a higher switching error rate) and hence the energy–delay product alone cannot be a good metric for benchmarking switches. Here, we show the trade-off between energy dissipation, energy–delay product and error–probability for an electronic switch (a metal oxide semiconductor field effect transistor), a magnetic switch (a magnetic tunnel junction switched with spin transfer torque) and an optical switch (bistable non-linear mirror). As expected, reducing energy dissipation and/or energy–delay product generally results in increased switching error probability and reduced reliability.
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4

Paulish, Andrey G., Oleg V. Minin, Yuri E. Geints, and Igor V. Minin. "Experimental Proof-of-Concept of a Spatial Photonic Switch Based on an Off-Axis Zone Plate in Millimeter Wavelength Range." Photonics 9, no. 10 (September 20, 2022): 670. http://dx.doi.org/10.3390/photonics9100670.

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Анотація:
Optical switches are key elements in modern network communications. We present the results of the experimental verification of a new theoretical concept proposed earlier for a full-optical wavelength-selective dual-channel switch based on the photonic hook effect, which is free from using any micro-mechanical devices or nonlinear materials. A large-scale laboratory prototype of such a device based on an off-axis Wood zone plate is considered, and its main parameters in the millimeter wavelength range are investigated. On the basis of the experiments, we show that the optical isolation of switched channels for a switch based on an off-axis zone plate can achieve 15 dB at a frequency difference of 25 GHz in a frequency range of 93 to 136 GHz. Given the scaling, these results can be transferred to another range, including the optical one.
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5

Cao, Yue, Daming Zhang, Yue Yang, Baizhu Lin, Jiawen Lv, Fei Wang, Xianwang Yang, and Yunji Yi. "Au Nanoparticles-Doped Polymer All-Optical Switches Based on Photothermal Effects." Polymers 12, no. 9 (August 29, 2020): 1960. http://dx.doi.org/10.3390/polym12091960.

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Анотація:
This article demonstrated the Au nanoparticles-doped polymer all-optical switches based on photothermal effects. The Au nanoparticles have a strong photothermal effect, which would generate the inhomogeneous thermal field distributions in the waveguide under the laser irradiation. Meanwhile, the polymer materials have the characteristics of good compatibility with photothermal materials, low cost, high thermo-optical coefficient and flexibility. Therefore, the Au nanoparticles-doped polymer material can be applied in optically controlled optical switches with low power consumption, small device dimension and high integration. Moreover, the end-pumping method has a higher optical excitation efficiency, which can further reduce the power consumption of the device. Two kinds of all-optical switching devices have been designed including a base mode switch and a first-order mode switch. For the base mode switch, the power consumption and the rise/fall time were 2.05 mW and 17.3/106.9 μs, respectively at the wavelength of 650 nm. For the first-order mode switch, the power consumption and the rise/fall time were 0.5 mW and 10.2/74.9 μs, respectively at the wavelength of 532 nm. This all-optical switching device has the potential applications in all-optical networks, flexibility device and wearable technology fields.
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6

Qianhuan Yu, Qianhuan Yu, Mingjian Wang Mingjian Wang, and Weibiao Chen Weibiao Chen. "Electro-optically Q-switched high-repetition-rate 1.73 \mu m optical parametric oscillator." Chinese Optics Letters 13, no. 8 (2015): 081406–81409. http://dx.doi.org/10.3788/col201513.081406.

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7

Luong Van, Hieu, and Kien Do Trung. "OPTIMAL PROVISIONING OF OPTICAL NETWORKS WITH ASYMMETRIC NODES." Journal of Science Natural Science 65, no. 10 (October 2020): 36–48. http://dx.doi.org/10.18173/2354-1059.2020-0046.

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Анотація:
Wavelength Switched Optical Networks (WSONs) have been designed to take advantage of all optical switching fabrics with a high level of automation and efficiency. Therein, the Wavelength Selective Switches (WSS) represent the core switching elements with a technology enabling multi-degree Reconfigurable Optical Add\Drop Multiplexers (ROADM) architectures with colorless and directionless switching. In this paper, we propose an optimization model to establish the best ROADM switching connectivity to maximize the grade of service, for a given number of ports. We show that the grade of service can vary significantly, up to 30%, depending on the switching connectivity. Besides, the larger the network is, the more the variance increases: from 20% to 30%, when the number of nodes varies from 14 to 24.
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8

Scognamiglio, Viviana, and Amina Antonacci. "Structural Changes as a Tool for Affinity Recognition: Conformational Switch Biosensing." Crystals 12, no. 9 (August 27, 2022): 1209. http://dx.doi.org/10.3390/cryst12091209.

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Biosensors draw inspiration from natural chemosensing based on molecular switches between different bond-induced conformational states. Proteins and nucleic acids can be adapted into switch-based biosensors with a wide plethora of different configurations, taking advantage of the variety of transduction systems, from optical to electrochemical or electrochemiluminescence, as well as from nanomaterials for signal augmentation. This review reports the latest trends in conformational switch biosensors reported in the literature in the last 10 years, focusing on the main representative and recent examples of protein-based switching biosensors, DNA nanomachines, and structure-switched aptamers being applied for the detection of a wide range of target analytes with interest in biomedical and agro-environmental sectors.
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9

Mokhtari, Mohammad Reza, Hamed Baghban, and Hadi Soofi. "Multilayer optical interconnects design: switching components and insertion loss reduction approach." Journal of Electrical Engineering 69, no. 3 (June 1, 2018): 226–32. http://dx.doi.org/10.2478/jee-2018-0030.

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Abstract The next generation of chip multi-processors point to the integration of thousands of processing cores, demanding high- performance interconnects, and growing the interest in optically interconnected networks. In this article we report on an interlayer silicon-based switch design that switches two channels simultaneously from an input waveguide into one of the two output ports. The introduced interlayer switch allows to design interconnects with previously unattainable functionality, higher performance and robustness, and smaller footprints with low insertion loss (< 1 dB), and high extinction ratio (> 18 dB). Interlayer switching combined with wavelength-routed and circuit-switched networks yield a low latency and low- loss interconnect architecture. Quantitative comparison between the proposed interconnect architecture and other reported structures in terms of loss, number of wavelengths and microring resonators reveals the proficiency of our design. For a 64-core interconnect implemented in 4 layers, the proposed architecture indicates an average loss reduction up to 42% and 43% with respect to single-layer lambda-router and GWOR.
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10

Buvana, D., and R. Jayashree. "ANFIS Controller-Based Cascaded Nonisolated Bidirectional DC–DC Converter." Journal of Circuits, Systems and Computers 28, no. 01 (October 15, 2018): 1950001. http://dx.doi.org/10.1142/s0218126619500014.

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The development of bidirectional DC–DC converters has become important because of their requirement in energy-storage systems. The simple structure of nonisolated bidirectional DC–DC converter types includes multilevel, switched-capacitor, buck-boost, and coupled inductor type. In multilevel and switched-capacitor types, if large voltage gain must be provided, more switches and capacitors are required. Since the leakage inductor energy cannot be recycled, voltage stresses on the switches are present. Therefore, the control strategy is easily implemented in the system operation. This paper presents a cascaded nonisolated dc–dc switched coupled converter for enhancement of the switching operation. For the optimal switching performances, an Artificial Intelligence (AI) technique is utilized. The AI technique is the Adaptive Neuro-Fuzzy Inference System (ANFIS) for generating the optimal control pulses to enhance the performance of boost and buck switch. In addition, the proposed technique is utilized in cascaded nonisolated DC–DC switched coupled converter to reduce the losses. In the ANFIS technique, the error voltage and change in error voltage are given as inputs. At the same time, the ANFIS controller is employed to reduce the error value and produce the optimized gain pulses. In the buck and boost switch mode of operation, it is enhanced with the help of the proposed technique. Moreover, the operating principle and voltage conversion ratio are discussed. It is seen that the implementation of the proposed controller improves the efficiency of the system and also reduces the voltage drop across the switching operation. Then the proposed ANFIS technique with bidirectional converter topology was implemented in MATLAB/Simulink working platform and the output performance is analyzed. Then the proposed circuit performance is compared to the existing circuit such as proportional integral derivative (PID), artificial neural network (ANN) and Fuzzy, respectively.
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Дисертації з теми "Optical switche"

1

Branč, Martin. "Media konvertory a optické switche." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218967.

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Анотація:
This Master´s thesis provides an overview of wired networks, its parameters, used standards and the deployment possibilities. Moreover, it includes the overall overview about optical networks, its parameters, maximum bandwidth, reachable distances as well as the advantages and disadvantages in comparition with wired networks. The project describes network elements which are used in the optical access network such as media convertors, optical switches etc. The practical part includes results of testing of the network devices in various scenarios. To get a comparable result, the real throughput, the power of each device and compatibility of devices from different producers were measured. At the end I have suggested few scenarios with the usage of optical switches and media convertors for extension of the current optical network. The calculation of costs for building and operation of the network is also included.
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2

Rossek, Sacha J. "Direct optical control of a microwave phase shifter using GaAs field-effect transistors." Thesis, Middlesex University, 1995. http://eprints.mdx.ac.uk/10682/.

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The design and analysis of a novel optical-to-microwave transducer based upon direct optical control of microwave gallium arsenide (GaAs) field-effect transistor (FET) switches is the subject of this thesis. The switch is activated by illuminating the gate depletion region of the FET device with laser light having a photon energy and wavelength appropriate to the generation of free carriers (electron-hole pairs) within GaAs. The effects of light on the DC and microwave properties of the GaAs FET are explored and analyzed to permit the characterization of the switching performance and transient response of a reflective microwave switch. The switch is novel in that it utilizes direct optical control, whereby the optically controlled GaAs FET is directly in the path of the microwave signal and therefore relies on optically-induced variations in the microwave characteristics of the switch. This contrasts with previous forms of optically controlled switches which rely on indirect methods with the optical stimulus inducing variations in the DC characteristics of the GaAs FET, such that there is no direct interaction between the optically illuminated GaAs FET and the microwave signal. Measured and simulated results relating to the switching performance and transient response of the direct optically controlled microwave switch have been obtained and published as a result of this work. For the first time, good agreement is achieved between the measured and simulated results for the rise and fall times associated with the transient response of the gate photovoltaic effect in optically controlled GaAs FET switches. This confirms that the GaAs FET, when used as an optically controlled microwave switch, has a transient response of the order of several micro-seconds. An enhanced model of the GaAs FET switch has been developed, which represents a more versatile approach and leads to improved accuracy in predicting switching performance. This approach has been shown to be valid for both optical and electrical control of the GaAs FET. This approach can be used to model GaAs FET switches in discrete or packaged forms and predicts accurately the occurrence of resonances which may degrade the switch performance in both switching states. A novel method for tuning these resonances out of the switch operating band has been developed and published. This allows the switch to be configured to operate over the frequency range 1 to 20 GRz. The agreement between the models and measured data has been shown to hold for two very different GaAs FET structures. The results of the direct optically controlled microwave GaAs FET switch have been used as the basis for the design of a novel direct optically controlled microwave phase shifter circuit; Measured and simulated results are in good agreement and verify that the performance of the optically controlled phase shifter is comparable with previously published results for electrically controlled versions of the phase shifter. The 10 GRz phase shifter was optically controlled over a 1 GRz frequency range and exhibited a mid-band insertion loss of 0.15 dB. The outcome of the work provides the basis for directly controlling the phase of a microwave signal using the output of an optical sensor, with the GaAs FET acting as an optical-to-microwave transducer through a monolithic interface.
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3

Ding, Minsheng. "Energy efficient high port count optical switches." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275326.

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The advance of internet applications, such as video streaming, big data and cloud computing, is reshaping the telecommunication and internet industries. Bandwidth demands in datacentres have been boosted by these emerging data-hungry internet applications. Regarding inter- and intra-datacentre communications, fine-grained data need to be exchanged across a large shared memory space. Large-scale high-speed optical switches tend to use a rearrangeably non-blocking architecture as this limits the number of switching elements required. However, this comes at the expense of requiring more sophisticated route selection within the switch and also some forms of time-slotted protocols. The looping algorithm is the classical routing algorithm to set up paths in rearrangeably non-blocking switches. It was born in the electronic switch era, where all links in the switches are equal. It is, therefore, not able to accommodate loss difference between optical paths due to the different length of waveguides and distinct numbers of crossings, and bends, leading to sub-optimal performance. We, therefore, propose an advanced path-selection algorithm based on the looping algorithm that minimises the path-dependent loss. It explores all possible set-ups for a given connection assignment and selects the optimal one. It guarantees that no individual path would have a sufficiently substantial loss, therefore, improve the overall performance of the switch. The performance of the proposed algorithm has been assessed by modelling switches using the VPI simulator. An 8×8 Clos-tree switch demonstrates a 2.7dB decrease in loss and 1.9dB improvement in IPDR with 1.5 dB penalty for the worst case. An 8×8 dilated Beneš shows more than 4 dB loss reduction for the lossiest path and 1.4 dB IPDR improvement for 1 dB power penalty. The improved algorithm can be run once for each switch design and store its output in a compact lookup table, enabling rapid switch reconfiguration. Microelectromechanical systems (MEMS) based optical switches have been fabricated with over 1,000 ports which meet the port count requirements in data centre networks. However, the reconfiguration speed of the MEMS switches is limited to the millisecond to microsecond timescale, which is not sufficient for packet switching in datacentres. Opto-electronic devices, such as Mach-Zehnder Interferometers (MZIs) and semiconductor optical amplifiers (SOAs) with nanosecond response time show the potential to fulfil the requirements of packet switching. However, the scalability of MZI switches is inherently limited by insertion loss and accumulated crosstalk, while the scalability of SOA switches is restricted by accumulated noise and distortion. We, therefore, have proposed a dilated Beneš hybrid MZI-SOA design, where MZIs are implemented as 1×2 or 2×1 low-loss switching elements, minimising crosstalk by using a single input, and where short SOAs are included as gain or absorption units, offering either loss compensation or crosstalk suppression though adding only minimal noise and distortion. A 4×4 device has been fabricated and exhibits a mere 1.3dB loss, an extinction ratio of 47dB, and more than 13dB IPDR for a 0.5dB power penalty. When operating with 10 Gb/s per port, 6pJ/bit energy consumption is demonstrated, delivering 20% reduced energy consumption compared with SOA-based switches. The tolerance of the current control accuracy of this switch is very broad. Within a 5 mA bias current range, the power penalty can be maintained below 0.2 dB for 8 dB IPDR and 12 mA for 10 dB IPDR with a penalty less 0.5 dB. The excellent crosstalk and power penalty performance demonstrated by this chip enable the scalability of this hybrid approach. The performance of 16×16 port dilated Beneš hybrid switch is experimentally assessed by cascading 4×4 switch chips, demonstrating an IPDR of 15 dB at a 1 dB penalty with a 0.6 dB power penalty floor. In terms of switches with port count larger than 16×16, the power penalty performance has been analysed with physical layer simulations fitted with state-of-the-art data. We assess the feasibility of three potential topologies, with different architectural optimisations: dilated Beneš, Beneš and Clos-Beneš. Quantitative analysis for switches with up to 2048 ports is presented, achieving a 1.15dB penalty for a BER of 10-3, compatible with soft-decision forward error correction.
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4

Ng, Han-Yong. "Thermally Controllable Microring Resonator-based Silicon Photonic Switch." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_theses/82.

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A 4 × 4 photonic switch matrix was designed, fabricated and characterized. The photonic switch matrix was based on microring resonator (MR) and was fabricated on relatively low-cost silicon-on-insulator (SOI). Independent wavelength channel switching was accomplished by thermo-optic tuning of the MRs through highly localized resistive micro-heaters. The device was fabricated using the relatively mature silicon fabrication technology. Waveguide patterns were defined with high definition eBeam lithography, etching was done in a reactive-ion etching chamber, and the top cladding SiO2 layer was deposited through plasma-enhanced chemical vapor deposition. Finally, resistive Nichrome micro-heaters were deposited locally directly above each MR to offer the dynamic tuning capability. The strong optical confinement offered by the high index contrast between silicon and SiO2 makes it possible to fabricate micrometer-sized MRs with acceptable optical power loss caused by the small bending radii. The MRs were designed with a uniform diameter of 10 µm to support a wide free spectral range. All waveguides have a design dimension of 450 nm × 250 nm to allow operation exclusively in the fundamental mode at the 1.55 µm wavelength. A FSR of 18 nm with a spectral linewidth of 0.1 nm were observed for the fabricated MRs offering high wavelength selectivity. The device exhibits virtually no thermal crosstalk between adjacent channels, showing no output peak wavelength shift at 0.01 nm wavelength measurement precision by thermally tuning an adjacent MR with electric current as high as 7 mA, which is equivalent to about 2.5 nm in resonance wavelength tuning. The device showed a tuning delay time of about 1 ms. The overall bare chip size of the device is 20 mm × 4 mm. We demonstrated through this work a wavelength selective photonic switch device using low-cost SOI technology that is compact and easy to fabricate. It shows high potential for further development into high port-count photonic switch matrix.
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5

Wang, Kai. "Design and experiment implementation on low energy and power controlled SOA based optical switches for large scale switch applications." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648882.

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6

Brown, G. J. "Optical switch systems." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419354.

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7

Ma, Yuan. "Optimal mems plate design and control for large channel count optical switches." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/2071.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2004.
Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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8

Chu, Hsiao-Hua. "Optical beam-steering switches." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271112.

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9

Vilar, Mateo Ruth. "Optical performance monitoring in optical packet-switched networks." Doctoral thesis, Universitat Politècnica de València, 2010. http://hdl.handle.net/10251/8926.

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Para poder satisfacer la demanda de mayores anchos de banda y los requisitos de los nuevos servicios, se espera que se produzca una evolución de las redes ópticas hacia arquitecturas reconfigurables dinámicamente. Esta evolución subraya la importancia de ofrecer soluciones en la que la escalabilidad y la flexibilidad sean las principales directrices. De acuerdo a estas características, las redes ópticas de conmutación de paquetes (OPS) proporcionan altas capacidades de transmisión, eficiencia en ancho de banda y excelente flexibilidad, además de permitir el procesado de los paquetes directamente en la capa óptica. En este escenario, la solución all-optical label switching (AOLS) resuelve el cuello de botella impuesto por los nodos que realizan el procesado en el dominio eléctrico. A pesar de los progresos en el campo del networking óptico, las redes totalmente ópticas todavía se consideran una solución lejana . Por tanto, es importante desarrollar un escenario de migración factible y gradual desde las actuales redes ópticas basadas en la conmutación de circuitos (OCS). Uno de los objetivos de esta tesis se centra en la propuesta de escenarios de migración basados en redes híbridas que combinan diferentes tecnologías de conmutación. Además, se analiza la arquitectura de una red OPS compuesta de nodos que incorporan nuevas funcionalidades relacionadas con labores de monitorización y esquemas de recuperación. Las redes ópticas permiten mejorar la transparencia de la red, pero a costa de aumentar la complejidad de las tareas de gesión. En este escenario, la monitorización óptica de prestaciones (OPM) surge como una tecnología capaz de facilitar la administración de las redes OPS, en las que cada paquete sigue su propia ruta en la red y sufre un diferente nivel de degradación al llegar a su destino. Aquí reside la importancia de OPM para garantizar los requisitos de calidad de cada paquete.
Vilar Mateo, R. (2010). Optical performance monitoring in optical packet-switched networks [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/8926
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10

Gunning, Paul. "Distributed optical TDMA photonic switch fabric based on gain-switched distributed feedback semiconductor laser diodes and electroabsorption modulators." Thesis, University of Essex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247025.

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Книги з теми "Optical switche"

1

V, Ramamurthy, and Schanze Kirk S, eds. Optical sensors and switches. New York: Marcel Dekker, 2001.

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2

Optical switches: Materials and design. Cambridge: Woodhead Publishing, 2010.

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3

Akbar Ghaffarpour, Rahbar, ed. Quality of Service in Optical Packet Switched Networks. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119056942.

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4

Venkatesh, T., and C. Siva Ram Murthy. An Analytical Approach to Optical Burst Switched Networks. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-1510-8.

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5

Venkatesh, T. An Analytical Approach to Optical Burst Switched Networks. Boston, MA: Springer Science+Business Media, LLC, 2010.

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6

Arye, Rosen, and Zutavern Fred J, eds. High-power optically activated solid-state switches. Boston: Artech House, 1994.

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7

Liu, Chongyang, and Zhaohua Gong. Optimal Control of Switched Systems Arising in Fermentation Processes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43793-3.

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8

J, Zutavern Fred, Society of Photo-optical Instrumentation Engineers., and OE/Boston '90 (1990), eds. Optically activated switching: 5-6 November 1990, Boston, Massachusetts. Bellingham, Wash., USA: SPIE, 1991.

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9

IEEE Computer Society. Technical Committee on Microprocessors and Microcomputers. and Nortel Networks, eds. Hot Interconnects 9: 22-24 August, 2001, Stanford University, Stanford, CA, USA. Los Alamitos, California: IEEE Computer Society, 2001.

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10

J, Soileau M., and Society of Photo-optical Instrumentation Engineers., eds. Materials for optical switches, isolators, and limiters: 28-29 March 1989, Orlando, Florida. Bellingham, Wash., USA: SPIE, 1989.

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Частини книг з теми "Optical switche"

1

Yuan, Shifu, and John E. Bowers. "Optical Switches." In Springer Series in Optical Sciences, 483–545. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-42367-8_10.

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2

Weik, Martin H. "optical switch." In Computer Science and Communications Dictionary, 1187. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_13157.

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3

Huang, Qirui. "Commercial Optical Switches." In Optical Switching in Next Generation Data Centers, 203–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61052-8_11.

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4

Hirao, Kazuyuki, Tsuneo Mitsuyu, Jinhai Si, and Jianrong Qiu. "Ultrafast Optical Switches." In Active Glass for Photonic Devices, 208–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04603-6_8.

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5

Koch, Ueli, C. Hoessbacher, A. Emboras, and J. Leuthold. "Optical Memristive Switches." In Electronic Materials: Science & Technology, 355–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-42424-4_15.

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6

Osgood, Richard, and Xiang Meng. "Integrated Optical Switches." In Graduate Texts in Physics, 295–316. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65193-0_13.

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7

Weik, Martin H. "film optical switch." In Computer Science and Communications Dictionary, 608. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_7165.

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8

Weik, Martin H. "mechanical optical switch." In Computer Science and Communications Dictionary, 994. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11269.

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9

Weik, Martin H. "amplifying optical switch." In Computer Science and Communications Dictionary, 43. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_589.

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10

Wakita, Koichi. "Surface Normal Switch." In Semiconductor Optical Modulators, 211–28. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-6071-5_9.

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Тези доповідей конференцій з теми "Optical switche"

1

Duthie, P. J., N. Shaw, M. J. Wale, and A. Moseley. "4X4 InP Crossbar Switch Array Using the Electro-Optic and Carrier Depletion Effects." In Photonic Switching. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.fa3.

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The choice of technology for guided wave optical switches must consider three major issues. Firstly the transparency of the data path will be determined by the waveguide and switch element optical characteristics. Secondly the switching speed of the elements, ranging from mS for optomechanical switches to sub-nS for electro-optical and carrier depletion switches, will be determined by the physical mechanism and by the electrical packaging. Switch speed is of especial importance when high data rates are being switched. These issues have been explored for lithium niobate, leading to the demonstration of a 16×16 guided wave electro-optic space switch [1]. The third issue, the monolithic integration of the optoelectronic circuit elements required for routing control and optical signal conditioning, can only be accomplished using a semiconductor technology.
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2

Koai, Kwang T., and Shing-Fong Su. "Performance of photonic switches using cascade-structured integrated optic devices." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.my3.

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In a practical photonic switching system using integrated optic devices, crosstalk and control are more of a problem than optical loss. In this paper, performances of photonic gate-type matrix switch1 and a time slot interchanger2 using cascaded-structured integrated optic modulators and switches are analyzed. Both have shown improved signal-to-crosstalk ratios (SXR) and the possibility of using a common control voltage without tuning for the switching components. We also compare these two photonic systems with those using conventional components by considering other performance factors such as optical insertion loss, device count, switch capability, and possible switch size, etc.
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3

Kobayashi, Hideki, Hirohisa Kanbara, Ken'ichi Kubodera, and Yoshito Shuto. "A picosecond optical-Kerr-shutter switch using an organic solution in a capillary waveguide." In Integrated Photonics Research. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/ipr.1991.tue4.

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Optically-controlled optical switches will be key elements in time-division multiplexing devices for future optical communication and computing systems. Glass fibers have been applied to such switches1 utilizing easy fabrication of long interaction length and small core diameter in fibers, however, their optical nonlinearities are quite small. Organic nonlinear optical materials have been applied to efficient optical switches.2,3 In this paper, an even more efficient, high-speed optical- Kerr-shutter switch is demonstrated using a recently-synthesized organic material, 4-(N,N-diethylamino)-β-nitrostyrene (DEANST),4 which has large third-order susceptibility x(3) and high solubility.
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4

Sakano, Toshikazu, and Kazuhiro Noguchi. "Turnover-type Free-space Multichannel Optical Switch." In Photonics in Switching. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ps.1993.pwc.5.

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Free-space optical switches are attractive candidates to replace conventional electrical switches in future supercomputers and telecommunication systems[1]. The switches have the potential to handle a large number of high speed signals without suffering from such problems as electromagnetic interference, signal delay, and clock skew. Liquid crystal light modulators which can control the polarization state of light are promising as the switching devices in such switches, because they make it easy to construct large arrays, and they are transparent to the lights being switched over a wide wavelength region. Several free-space multichannel optical switches based on these devices have been proposed for multistage optical switching networks [2],[3]. The optical switches are the one-way type in which optical signals enter one side of the switch body and are output from the other side. Input and output fiber arrays must, therefore, be situated on both sides of the switch. In applying such switches to intra-board chip-to-chip interconnects in a multiprocessor system, the input and output links of each processor have to be connected to the optical switch via input and output optical fibers, respectively [4]. This scheme causes wiring congestion and restricts the architecture of the system if the number of processors is increased.
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5

An, X., F. R. Beyette, S. A. Feld, K. Geib, C. W. Wilmsen, H. Y. Lee, M. J. Hafich, and G. Y. Robinson. "Gated Optical Latch Based on InGaAs/InP Light Amplifying Optical Switch." In Photonic Switching. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.we15.

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Optical switching devices are of much interest in optoelectronic computing systems, especially for optoelectronic integrated circuits. Several types of optical switching devices have previously been developed, such as the self electro—optic effect device (SEED), double heterojunction optoelectronic switch (DOES), an integrated combination of a heterojunction phototransistor (HPT) and a light—emitting diode (LED) called a light amplifying optical switch (LAOS), and pnpn switches. With the exception of the SEED, all of these switches have demonstrated a similar switching I—V curve composed of a high—impedance off-state, a low—impedance on—state and a differential negative resistance region connecting the two as shown in Fig. 1. Most of the switches discussed above can be triggered on with an input light pulse, but they cannot be turned off optically. The only way to turn the switch off without using additional components is to reduce the electrical bias to zero. This switching has been utilized in the implementation of an optical memory which is electrically erasable [1], and an optoelectronic flip-flop based on two parallel pnpn switches using the bias pulse as a clock [2]. From the I—V curve of Fig. 1, it can be seen that there are two possible ways to optically turn the switch off: i) Place an optically sensitive element in shunt with the switch which can reduce the bias across the switch to a level lower than the holding voltage (usually about 0.8 ~ 1.2V); or ii) Place an optical element in series with the switch in order to reduce the current passing through the switch below the critical current. The first approach has been applied successful to the fabrication of an all—optical bistable switch with optical set/reset pulses [3]. This device incorporates an additional HPT in parallel with the switch. We have implemented the second technique by placing an HPT in series with the switch to form a gated optical latch.
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6

Robinson, Michael G., Kristina M. Johnson, and David Doroski. "Ferroelectric liquid crystal optical exchange switches." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mii1.

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Optical 2 × 2 exchange switches can be utilized as routing elements for optical computing and fiber optic based networking systems. Here we demonstrate a 2 × 2, polarization independent ferroelectric liquid crystal (FLC) optical exchange switch, which can be used for these applications. Based on the nematic liquid crystal switch of Wagner and Cheng,1 it operates by separating the input beam into two orthogonal polarizations with a polarizing beam splitter. The beams are then directed through a surface stabilized, parallely aligned FLC cell. By applying ±15 V across the cell the optical polarization is either switched or left unaltered. Using a further polarizing beam splitter, the beams are recombined to produce a single unpolarized beam; its direction is determined by whether the FLC was switched or not. Due to its symmetry, this device can operate as a 2 × 2 exchange switch. Preliminary measurements indicate switching speeds of <30 µs at ±15 V with <−16-dB crosstalk primarily as a result of the beam splitter performance. Device component specifications suggest an operational bandwidth of 30 nm either side of the designed wavelength. Better results are expected with faster FLC cells and improved beam splitters. Other novel total internally reflecting FLC switch designs are being investigated that are polarization independent and have extinction ratios similar to the device of Meadows et al.2
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7

Cheng, L., and A. A. Sawchuk. "Optoelectronic bypass/exchange switches." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mq5.

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Multistage networks, such as the Omega/shuffle-exchange network, Clos/Benes network, etc., are widely used in telecommunications and parallel signal processing today. An optical implementation of these networks is desirable because of its high data rates, low crosstalk, and the feasibility of 2-D structures in optics. Shuffling interconnections and bypass/exchange switches are two basic building blocks in a multi stage network. The free-space optical perfect shuffle, 2-D folded perfect shuffle, and 2-D separable shuffle have been described.1-4 Stirk and Athale proposed an optical implementation for bypass/exchange switch based on latching logic5. We present several optoelectronic designs for single and multistage 2×2 bypass/exchange switch modules. One design is for a general 2×2 single stage circuit switched module which can perform bypass, exchange, and broadcasting functions. In this module, control and power are supplied at wavelength λ2, while data are passed at wavelength λ1. A second design is for a bypass/exchange switch in which both data and control are carried at λ1, while power is supplied at λ2. This design can operate in both packet or circuit switched mode. Finally, we discuss modules for use in multistage networks. In this application, signal routing information can be inserted from a controller at each stage, or the data can be self-routed by headers attached to each data packet. We also present a multistage bypass/exchange 2×2 switch capable of central control or self-routing.
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8

Nightingale, J. L., J. S. Vrhel, and T. E. Salac. "Low-Voltage, Polarization-Independent Optical Switch in Ti-Indiffused Lithium Niobate." In Integrated and Guided Wave Optics. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/igwo.1989.maa3.

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Polarization-independent optical switches are attractive in fiber optic instrumentation and telecommunication systems because of their compatibility with conventional optical fiber. Several different types of polarization-independent switches have been proposed and demonstrated [1-3]. In general, these switches have had high switching voltages, complex electrode structures, or demanding fabrication tolerances. We report on a new type of polarization-independent switch, using the balanced-bridge switch concept. This switch employs a simple electrode structure, has a low switching voltage, and is inherently polarization insensitive. Using this concept, we have demonstrated polarization-independent switching at optical wavelengths of 830 and 1150 nm.
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9

Tsai, C. S., and P. Le. "A 4 X 4 Nonblocking Acoustooptic Waveguide Space Switch." In Photonic Switching. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.we7.

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Optical space switch arrays and matrices in waveguide format constitute vitally important components in wideband multichannel fiber optic communication systems.(1) Most of the existing optical waveguide space switch matrices utilize electrooptic (EO) effects in LiNbO3 and may be cataloged into two types, namely, those utilizing parallel channel waveguide (directional-coupler) switches(2) in one and those utilizing intersecting channel waveguide (TIR-, X- or digital) switches(3) in the other. However, all switch matrices referred to above are configured in stages (or tandem), and require a large number of basic cross-point switches as the size of the switch matrix or the number of input and output ports increase. As a result, the real estate of the substrate and the optical propagation losses and crosstalks as well as the complexity in both electrode layouts and electronic driver circuits greatly increase with the size of the switch matrix. Furthermore, both the optical insertion loss and the crosstalks may vary widely with the route the light takes.
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10

Komatsu, K., K. Hamamoto, M. Sugimoto, Y. Kohga, and A. Suzuki. "Polarization Independent GaAs/AlGaAs Electro-Optic Guided-Wave Directional Coupler Switch Using (111)-Oriented GaAs Substrate." In Photonic Switching. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.fa2.

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The interest in guided-wave optical switches made of III-V semiconductor compounds for photonic switching application is growing, because of their large scale integration capability and their ability to be integrated with other semiconductor devices. Therefore, several kinds of optical switch, such as a carrier injection type switch[1], a gain guide type switch[2] and a directional coupler type switch[3], have been investigated. Among them, a GaAs/AlGaAs electro-optic directional coupler (EODC) is attractive, because of its low absorption loss at long wavelength region[4], fast switching speed, low electric power consumption and wavelength independent operation capability. Therefore, a GaAs/AlGaAs EODC is promising as a cross-point element in an integrated matrix switch. Actually, 4×4 GaAs/AlGaAs matrix switches with quite uniform device characteristics have already been realized[5] by the authors. However, all of reported semiconductor directional coupler switches, so far using electro-optic effect, have been polarization sensitive. Polarization independent semiconductor EODCs, compatible with standard single-mode fibers, are desired for practical use. Although some polarization independent LiNbO3 switches have been recently reported[6],[7], no attempt to realize polarization independent semiconductor EODC has been made yet.
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Звіти організацій з теми "Optical switche"

1

Osman, Joseph M. Optical Switch Evaluation. Fort Belvoir, VA: Defense Technical Information Center, January 1996. http://dx.doi.org/10.21236/ada307799.

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2

Kalman, Robert F., Leonid G. Kazovsky, and Joseph W. Goodman. Space-Division Optical Switches Based on Semiconductor Optical Amplifiers. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada247616.

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3

Eknoyan, O., and H. F. Taylor. Advanced Guided Wave Electro-Optical Switches. Fort Belvoir, VA: Defense Technical Information Center, February 1990. http://dx.doi.org/10.21236/ada219784.

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4

Swanson, Paul D., Michael A. Parker, and Stuart I. Libby. Evaluation of Laser Diode Based Optical Switches for Optical Processors. Fort Belvoir, VA: Defense Technical Information Center, July 1993. http://dx.doi.org/10.21236/ada270949.

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5

Xu, S., G. Martinelli, and H. Harai. Signaling Extensions for Wavelength Switched Optical Networks. Edited by G. Bernstein and Y. Lee. RFC Editor, November 2015. http://dx.doi.org/10.17487/rfc7689.

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6

Kalman, R. F., L. G. Kazovsky, and J. W. Goodman. Space Division Switches Based on Semiconductor Optical Amplifiers. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada247619.

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7

Geis, M. W., R. J. Molnar, G. W. Turner, T. M. Lyszczarz, R. M. Osgood, and B. R. Kimball. 30 to 50 ns Liquid-Crystal Optical Switches. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada524121.

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8

Scherer, Axel. Optical Logic With Gain: Photonic Crystal Nanocavity Switches. Fort Belvoir, VA: Defense Technical Information Center, July 2007. http://dx.doi.org/10.21236/ada469324.

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9

Rhodes, M. A., B. W. Woods, and J. J. DeYoreo. Design and performance of the beamlet optical switch. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/376937.

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10

Donaldson, William R., and Alan M. Kadin. Optically Triggered, Superconducting Opening Switch. Fort Belvoir, VA: Defense Technical Information Center, January 1994. http://dx.doi.org/10.21236/ada292642.

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