共查询到20条相似文献,搜索用时 125 毫秒
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本文对GaAs衬底边缘照射微带型线型光控微波开关进行了开关的结构参数设计,对开关的插入损耗和隔离度进行分析计算,并进一步讨论了频率响应及其光脉冲能量对开关隔离度的影响。 相似文献
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对反射型GaAs光控微波开关的结构、实验系统和特性参量进行了研究。实验测出该微波开关的插入损耗低于1dB,隔离度达到30dB。用50ns光脉冲照射开关,其开关速度小于10ns。 相似文献
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光开关是自动交换光网络中的核心器件,其在未来全光网中发挥着重要作用。总结了光开关实现方法的最新进展、超高速光控开关的工作原理和实际应用,阐述了自行研发的程控光开关检测系统的原理和实现。 相似文献
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光开关是实现未来全光网络的关键技术.光开关可广泛应用于光交叉连接、分插复用、光网络监控以及自愈保护等设备中.本文介绍了新的光开关技术,包括微机电(MEMS)光开关、液晶光开关、喷墨气泡光开关、热光光开关、全息光栅开关、声光开关、磁光开关、电光开关以及光控开关等,并对当前光纤开关市场作了简要的评述. 相似文献
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针对电力系统中微机电系统(MEMS)光开关在切换备纤时可能受到光控信号的影响而造成光时域反射仪(OTDR)发生损坏的问题,文章提出了一种电力系统中MEMS光开关切换路径优化控制的方法,在对MEMS光开关进行完整的扫描后得到其精确的光信号通道功率等高图,然后再对其切换路径进行优化控制,使得MEMS光开关可以在平衡控制通道切换时间的前提下使入射光沿相对通道隔离度最高的最佳路径进行切换控制,同时也可以在保证切换时间的前提下将MEMS光开关在切换时对其他通道的影响降到最低,并且即使在通道环境非常复杂的情况下也不受影响。 相似文献
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高性能的光敏开关器件是实现直接光控有源频率选择表面(AFSS)的关键。文中阐述了硫化镉光敏
薄膜的优点和长引脚硫化镉光敏电阻器件的劣势,对四款不同的贴片硫化镉光敏电阻直流特性与微波特性进行了
研究与分析。对加载有环保光敏电阻的圆环缝隙频率选择表面(FSS)进行实验验证,确定了单缝型微带线光控开关
作为直接光控AFSS 基础模型的有效性。同时,对直接光控AFSS 中常用半导体硅和同族体锗进行了微波微带开关
测试,表明锗并不适用于光控微波开关。最后对潜在可用于直接光控的新型半导体材料进行了展望。 相似文献
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刘琳 《光纤与电缆及其应用技术》2002,(6):10-13
人们对光开关的研究巳有二三十年的历史,全光网络的发展,需要高速传输大量数据,光开关越来越受到重视。由于新的光开关技术不断涌现,光开关的规模化和集成化程度不断提高,为此介绍了光开关技术的发展现状及其应用。 相似文献
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全光网络中的MEMS光开关研究新进展 总被引:3,自引:0,他引:3
光开关是未来全光网络中关键的光交换器件。MEMS技术由于其自身的诸多优点而被认为是目前最有前景的光器件制作技术之一。本文简要论述了MEMS光开关与其他类型光开关的区别,介绍了MEMS光开关的特性,并分别就二维、三维及最近提出的一维MEMS光开关进行了介绍和比较。最后,综合探讨了MEMS光开关目前所面临的各种挑战。 相似文献
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GAO Qing SHENG Zhi-rui JIANG Xiao-qing WANG Ming-hua 《半导体光子学与技术》2005,11(4):270-274
Optical switches are key components for constructing optical communication networks, so it is necessary to design optical switches and optical switch arrays with high performance and low cost. As one type of optical switches, the multimode interference(MMl) switches have received considerable attention due to their unique merits. The structures and operation principles of various types of MMI switches are introduced, and the recent progresses of MMI switches are also discussed. 相似文献
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MEMS optical switches 总被引:9,自引:0,他引:9
Leveraging MEMS's inherent advantages such as the batch fabrication technique, small size, integrability, and scalability, MEMS is positioned to become the dominant technology in optical crossconnect switches. MEMS optical switches with complex movable 3D mechanical structures, micro-actuators, and micro-optics can be monolithically integrated on the same substrate by using the matured fabrication process of the integrated circuit industry. In this article we report various popular actuating mechanisms and switch architectures of MEMS optical switches. The basics of surface and bulk micromachining techniques used to fabricate MEMS devices are reviewed. Examples of 2D and 3D approaches to MEMS optical switches are described. The pros and cons of the two approaches are analyzed. In the short term, MEMS-based optical switches seem to have captivated the attention of both the industry and academia. However, there are challenges that threaten the long-term survival of this technology. The problems that remain to be fully addressed are discussed 相似文献
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A comparison of the switch energies of electrically controlled optical absorption switches and electronic switches is performed. It is shown that in the investigated case with quantum box based absorption switches, the switch energies of the optical switches are generally orders of magnitude larger than those of the electronic switches for very high frequencies. Consequences on integration of optical devices as well as on the potential for photonic switching and processing are briefly discussed 相似文献
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This paper proposes micromechanical optical switches which are suitable for integration in an optical waveguide substrate. The switching mechanism is based on the capillary effect induced by a temperature gradient. The switch has a simple structure which consists of a oil filled slit and a pair of microheaters. We designed two types of thermocapillary optical switches. One was a bubble-driven type, the other was an oil-column-driven type. We fabricated both types of 1×3 micro-switches and demonstrated excellent optical switching and self-latching performance 相似文献
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Nelson W.H. Masum Choudhury A.N.M. Abdalla M. Meland E. Niland W. 《Photonics Technology Letters, IEEE》1994,6(11):1332-1334
Record polarization-independent extinction ratios are reported for ridge waveguide digital optical switches in InP/InGaAsP. Wavelength insensitivity is demonstrated for the first time, with extinction ratios that exceed 20 dB at both 1.3 and 1.5 μm for the same switch. The switch's total opening angle of 0.5° is more than a factor of two larger than other digital optical switches demonstrated at any wavelength 相似文献
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MEMS 光开关技术的研究进展 总被引:2,自引:0,他引:2
近年来国际上出现的一些新型MEMS光开关,包括其结构、驱动方式、规模等。并且通过对基于各种不同工作机理的光开关之问,性能、结构及可实行产业化程度等各方面数据的分析比较,认为MEMS光开关在现代光通讯领域具有较好的应用发展前景。 相似文献
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