- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2019 European Space Power Conference (ESPC) - Juan-les-Pins, France (2019.9.30-2019.10.4)] 2019 European Space Power Conference (ESPC) - Reverse and Forward Modelling of Multijunction Solar Cells with Ecosim
摘要： We demonstrate error-free 100-Gb/s optical packet switching with low power consumption by using a combination of a label processor and 8 × 8 broadcast-and-select (B&S) optical switch. To achieve energy-ef?cient label processing, an optical-trigger-pulse generator that consumes energy only for a very short duration is realized, whereas the optoelectronic serial-to-parallel converter used to interface the fast label bits to a slow CMOS processor has been improved to operate with a reduced trigger pulse energy of 0.35 pJ. Moreover, the electro-absorption-modulator-based B&S optical switch is signi?cantly enhanced by introducing a surface ground electrode for eliminating electrical crosstalk and integrated spot-size converters with easy fabrication process. The total power consumption of the full 8 × 8 optical packet switch is estimated to be as low as 27.3 W or 3.4 W/100-Gb/s port.
关键词： optical label processor,optical switches,optical circuit switching (OCS),optical packet switching (OPS),Data center network
更新于2025-09-23 15:19:57
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Stress Test of Nanosecond Semiconductor Cavity Switches with Subterahertz Gyrotrons
摘要： Nanosecond semiconductor switches based on resonant cavity with reversibly variable Q-factor are the most prospective devices for generating unlimited series of coherent pulses in subterahertz frequency bands. The pulse duration stretches from nanoseconds to tens of seconds for the same device. While the subterahertz switches have already been tested with various continuous-wave generators, e.g. semiconductor transistors and backwards wave oscillators, they are intended to be used with gyrotrons, the most powerful generators of coherent microwave radiation for subterahertz bands. Here we present results of several experiments with continuous wave (CW) and pulsed gyrotrons with frequencies around 300 GHz, pulse durations up to 10 s, and stressful microwave power up to 180 kW. A simple generalized theoretical estimation for the microwave power limit of the switches is provided and found to be in a good agreement with the performed experiments, avoiding blind zones in subterahertz measurements.
关键词： lasers,switches,waveguides,gyrotrons,Semiconductor devices,microwave resonators,generation,optical switches
更新于2025-09-19 17:15:36
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[IEEE 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Sozopol, Bulgaria (2019.9.6-2019.9.8)] 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Effect of Ag, Cu, and Co Underlayers on Luminescence and Lasing of Vapor-Phase-Grown ZnO Microcrystals
摘要： An ultrafast electro-optical amplified switch based on chip-on-carrier semiconductor optical amplifier with high optical contrast (33 dB) is presented. Switching times up to 115 ps with small overshoot were achieved by using the multi-impulse step injected current technique. These results are compared with previous preimpulse step injected current technique, and achieve a reduction of the inherent, post switching gain fluctuations without worsening the switching times. In addition, pulse formats for controlling such a kind of electro-optical switches are numerically analyzed and compared with experiments.
关键词： Electro-optics switches,semiconductor optical amplifiers,optical switches
更新于2025-09-19 17:13:59
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[IEEE 2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC) - Jackson, WY, USA (2018.6.3-2018.6.7)] 2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC) - Solid State Laser Triggering System for the HERMES-III Accelerator
摘要： The Hermes III accelerator is a 20-MV linear induction accelerator that has been in operation at Sandia National Laboratories since the late 1980’s. Energy is initially stored in the accelerator in ten Marx banks that are discharged into twenty intermediate store capacitors. These intermediate store capacitors are then switched with SF6-insulated high voltage Rimfire switches into eighty parallel pulse forming lines that further condition the pulse before finally delivering it to the twenty induction cavities arrayed along the axis of the machine. Currently, a single 0.9-J KrF laser operating at 248 nm, the output of which is divided into twenty separate beamlets, is being used to trigger the Rimfire switches. However, as part of a modernization plan for the accelerator, the gas laser system is being replaced with a new solid-state laser triggering system. The new system is comprised of 10 flash-lamp pumped, Q-switched Nd:YAG lasers (Tempest 300), each having an energy output of 35~40 mJ at a wavelength of 266 nm. Each laser will be responsible for triggering two Rimfire switches. Overall reliability for the accelerator’s operation with these new lasers is expected to increase, and by varying the times at which the individual lasers fire it becomes possible to tailor the shape of the output pulse. The optical layout and other details of this solid-state laser triggering system are presented, along with initial operational data from the HERMES III accelerator using this system.
关键词： Rimfire switches,laser triggered switches,pulsed power accelerator,solid-state lasers
更新于2025-09-19 17:13:59
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[IEEE 2019 12th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) - Hangzhou, China (2019.10.21-2019.10.23)] 2019 12th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) - Potential Applicability of Single-Walled Carbon Nanotube Through-Silicon Vias for Differential Signal Transmission
摘要： An ultrafast electro-optical amplified switch based on chip-on-carrier semiconductor optical amplifier with high optical contrast (33 dB) is presented. Switching times up to 115 ps with small overshoot were achieved by using the multi-impulse step injected current technique. These results are compared with previous preimpulse step injected current technique, and achieve a reduction of the inherent, post switching gain fluctuations without worsening the switching times. In addition, pulse formats for controlling such a kind of electro-optical switches are numerically analyzed and compared with experiments.
关键词： Electro-optics switches,semiconductor optical amplifiers,optical switches
更新于2025-09-19 17:13:59
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[IEEE 2019 22nd International Multitopic Conference (INMIC) - Islamabad, Pakistan (2019.11.29-2019.11.30)] 2019 22nd International Multitopic Conference (INMIC) - Secure optical fiber transmission via ghost imaging
摘要： We demonstrate error-free 100-Gb/s optical packet switching with low power consumption by using a combination of a label processor and 8 × 8 broadcast-and-select (B&S) optical switch. To achieve energy-ef?cient label processing, an optical-trigger-pulse generator that consumes energy only for a very short duration is realized, whereas the optoelectronic serial-to-parallel converter used to interface the fast label bits to a slow CMOS processor has been improved to operate with a reduced trigger pulse energy of 0.35 pJ. Moreover, the electro-absorption-modulator-based B&S optical switch is signi?cantly enhanced by introducing a surface ground electrode for eliminating electrical crosstalk and integrated spot-size converters with easy fabrication process. The total power consumption of the full 8 × 8 optical packet switch is estimated to be as low as 27.3 W or 3.4 W/100-Gb/s port.
关键词： optical label processor,optical switches,optical circuit switching (OCS),optical packet switching (OPS),Data center network
更新于2025-09-19 17:13:59
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[IEEE 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Rome, Italy (2019.6.17-2019.6.20)] 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Bismuth and Bismuth Telluride Thin Films Deposited by MOCVD upon Tapered Fiber Sections as Q-switches for Fiber Lasers
摘要： Lasing regimes of ring erbium ?ber lasers passively Q-switched by means of ?ber tapers coated with thin crystalline ?lms of either Bi2Te3 or Bi as saturable absorbers (SAs) are investigated. 10–15 μm in diameter and 5–10 mm long ?ber tapers are prepared by local chemical etching out of a silica light re?ecting cladding of the standard SMF-28 optical ?ber. Nanometer thick island ?lms of pure Bi and Bi2Te3 are synthesized on the surface of the ?ber tapers by applying the metalorganic chemical vapor deposition (MOCVD). The deposited ?lms are then covered with two di?erent polymers: either polyvinyl acetate (PVA) or polydimethylsiloxane elastomer (PDMSE). The ?ber section with polymer-coated SA ?ber is installed into the ring laser cavity in tandem with the section of an active ?ber. For all the samples a stable generation of microsecond pulses in the Q-switch mode at a wavelength of about 1560 nm is observed. To the best of our knowledge, a passively Q-switched ?ber laser with nanometer Bi ?lms as a saturable absorber is implemented for the ?rst time. It is established that even a small increase in the temperature of the surrounding medium leads to a signi?cant increase in the transmission coe?cient of polymer-coated tapers with deposited SA ?lms, which may be attributed to a decrease in the refractive index of the polymers. The most signi?cant increase in the transmission coe?cient with increasing temperature is observed in tapers coated with PVA, which has a refractive index larger than fused silica.
关键词： MOCVD,Q-switches,polymer coating,saturable absorbers,Bi2Te3,fiber lasers,Bi
更新于2025-09-19 17:13:59
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Ultrafast Nano-scale Optical Switching in a Plasmonic Interferometer with Enhanced Tunability
摘要： An all-optical switch based on plasmonic metal–insulator–metal (MIM) waveguides and the Mach–Zehnder (MZ) interferometer is designed. In order to realize an all-optical and active switch, a nonlinear material with intensity-dependent refractive index is introduced in one arm. Other than studying a typical MZ structure, we also investigate the asymmetric case where unequal thicknesses and distances for MZ arms are proposed. The finite element method (FEM) with a refined triangle mesh is employed for simulations. Results for ON and OFF states are provided with or without employing the pump field. Investigation of the geometrical dispersion reveals tunability of the structure for specific frequencies in the terahertz region. Finally, we show that introducing asymmetric arms provides better tunability in the designed ultrafast nano-scale switch and suggests its potential applications in integrated optical circuits.
关键词： Nonlinear optical devices,Mach-Zehnder interferometer,Surface plasmon polaritons,Plasmonic switches
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Compact silicon multicast switch for pCDC ROADM based on thermooptic Mach-Zehnder interferometers
摘要： We propose an optimized multicast switch for colorless, directionless and partially contentionless ROADM and experimentally demonstrate a 2×8 silicon multicast switch, which consists of six 3-dB multimode interference splitters and four Mach-Zehnder 2×2 optical switches.
关键词： Optical interconnect,multicast,silicon photonics,optical switches,CDC ROADM
更新于2025-09-16 10:30:52
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Energy Efficient Switching Technique for High-Speed Electro-Optical Semiconductor Optical Amplifiers
摘要： The analysis and performance of an efficient microwave coupler using asymmetrical impedance matching are introduced aiming high-speed electro-optical space switches employing a semiconductor optical amplifier (SOA). Through the reduction of the step matching resistor, its parasitic, and the optimization of the injected electrical switching signals, the proposed coupler was able to significantly reduce the SOA energy consumption while maintaining its ultrafast state transition with reduced transient behavior. Overall, the SOA-based switching action achieved guard times below 500 ps with overshoots close to 0% while operating with low bias currents and short pre-impulses, with a driver power close to 135 mW and energy consumption of 3.4 pJ/bit.
关键词： Electro-optical devices,semiconductor optical amplifiers,electro-optical switches
更新于2025-09-16 10:30:52