共查询到18条相似文献,搜索用时 171 毫秒
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设计了一种基于聚合物材料的延迟线阵列与热光开关的集成器件.利用Rsoft软件设计并模拟了多模干涉热光开关的性能,可实现输出光场强度随电极加热温度变化.设计了螺旋结构的延迟线阵列,利用BPM软件对螺旋结构波导进行数值模拟,综合考虑器件尺寸和损耗参量设计出螺旋结构的弯曲半径.将延迟线阵列结构与热光开关进行集成,能够实现热光控制的聚合物延迟线阵列,该器件可实现的最大延迟时间为399.4ps,延迟间隔为9.2ps.以SiO2为下包层,SU-8紫外固化光刻胶为波导芯层,聚甲基丙烯酸甲脂为上包层,采用旋涂、光刻、湿法腐蚀等工艺制备了1×4延迟线阵列与MMI热光开关的集成器件,测试得到了延迟线阵列的近红外输出光斑,插入损耗为15~19dB. 相似文献
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介绍了红外杜瓦组件的总体封装形式并回顾了国内外的发展情况,对7通道长波光导线列器件在杜瓦瓶中的基板封装形式进行了研究,提出了三种基于厚膜工艺和薄膜工艺的陶瓷基板封装形式.其中,第一种“直接引线式封装”体积过大,第二种“陶瓷针型栅格阵列封装”形式缺少合适接插件,而第三种”分时分组封装”形式使用了薄膜和厚膜基板相键合分时读出的方式,不仅很好地解决了布线问题,而且能方便地使用柔性电缆将信号引出,系统性能要求得到满足. 相似文献
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利用成熟的偏振控制技术,设计了一种由偏振光分束器、相位型空间光调制器和反射镜构成的2×2光开关,该光开关所用器件少,具有结构简单紧凑、控制灵活方便、功能实现与信号光的偏振态无关以及可以双向交换等特点;在此基础上通过2×2光开关的串连,设计了一种与偏振无关的双向4×4光开关的实验模块,根据其路由选择与控制方法,得到了4×4光开关实现信号光全排列无阻塞输出与交换对应的路由状态表,并对该实验模块的功能实现进行了详细的分析与讨论。 相似文献
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N × N集成光开关阵列模型 总被引:9,自引:8,他引:1
报道了由2N个1 × N 多模干涉马赫-曾德尔光开关组成的N × N光开关阵列结构,分析了这种结构的开关阵列优势和局限性.用场传输矩阵方法建立了1 × N多模干涉光开关的光场传输方程.给出了光开关阵列从任一输入端输入、从任一输出端输出时阵列开关的工作条件.在上述原理及理论基础上分析了4×4光开关阵列的结构和工作条件. 相似文献
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非线性光学器件的主要应用目的之一是全光信号处理,非线性光波导象其它非线性光学器件一样,也已被广泛地应用于全光信号处理方面的研究,如人们已采用棱镜波导非线性分布耦合方式来实现全光限幅、全光开关和全光双稳等研究[1,2].在非线性光波导器件中,由于光被束缚在微米尺寸的光波导中传输,而大大增加了光功率密度,因此,在光与非线性光波导的相互作用过程中可以大幅度地降低非线性效应的阈值功率,提高全光信号处理的灵敏度.此外,非线性光波导器件的小型化、集成化等优点更吸引人们去进行深入的研究. 相似文献
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Novel optical sensor for simultaneous measurement of liquid concentration and temperature 总被引:1,自引:0,他引:1
Bao-Jin Peng Yong Zhao Chao-Fu Ying Yun-Tao Liu Hui Wang 《Optics & Laser Technology》2007,39(1):105-109
The paper describes a new optical sensor for simultaneous liquid concentration and temperature measurement. Temperature-dependent semiconductor absorption at the band edge is used as the principle of the temperature measurement, and the sensor exploits beam deviation caused by refraction due to the liquid concentration at the receiving end face of the optical device. The light intensity peak value and its deviation are detected by a charge-coupled device (CCD), and then the measured optical signal is reflected by a reflecting pyramid prism. The sensor probe is composed of an intrinsically pure GaAs single crystal, a reflecting pyramid prism, a partitioned water cell. Theoretical analysis and preliminary experimental results verify the feasibility of the proposed system. 相似文献
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In this paper, a design of a generic multipurpose device is described. It can operate, in its basic structure, as a tunable
wavelength filter, wavelength multiplexer or λ router; by using a more complex structure, the device works as an optical add
drop multiplexer (OADM) or/and optical switch (OS). It can be used in both coarse and dense wavelength division multiplexing
technology (CWDM/DWDM) according to the network application. Performance parameters of the device, like switching time, losses,
crosstalk or polarization insensitivity are analyzed and compared with other switching technologies. Some applications of
the holographic WDM multifunction device in METRO networks are described, such as the utilization of OADMs in optical path
protection/reconfiguration between nodes (1 + 1 configuration) and the use of optical switches to interconnect nodes of the
METRO–access network with the METRO-Core or long haul networks in a reconfigurable topology. Other applications in Access
networks are possible, like the use of the OADMs in optical path protection between the optical line termination (OLT) at
the central office (CO) and the remote node (RN) in a fiber to the office passive-optical network (FTTO-PON) or, in some specific
cases, the utilization as tuneable holographic filters in a FTTO application, at the Business ONT (BONT), to select the assigned
optical wavelength according to the services provided to the customer. 相似文献
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Rajat Kumar Singh Rajiv Srivastava Yatindra Nath Singh 《Optical and Quantum Electronics》2007,39(14):1153-1165
Optical packet switching provides high speed, data rate/format transparency, efficient use of bandwidth and flexibility. The
major problem in the implementation of “all-optical” switching is contention which occurs when two or more packets arrive
at the same time for the same destination. To resolve the contention, we have proposed an optical packet switch architecture
based on WDM loop buffer memory in the feedback configuration. In that architecture, the contending packets are stored in
a loop buffer module, and routed in the free time slots. The buffering duration in the recirculating loop is limited by a
circulation limit. The analysis was been done to obtain the maximum number of allowed circulations. This paper proposes improved
version of that optical packet switch architecture, to increase the number of maximum allowed circulations. The modification
is done either by adding an extra erbium doped fiber amplifier (EDFA) in the original switch or by replacing the core space
switch with arrayed waveguide grating (AWG). The performance analysis has been done by the simulations. 相似文献
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The very fast running optical memory and optical logic gates are the basic building blocks for any optical computing data processing system. Realization of a very fast memory-cell in the optical domain is very challenging. In the last two decades many methods of implementing all-optical flip-flops have been proposed. Most of these suffer from speed limitation because of low switching response of the active devices. In our present communication the authors propose a method of developing a frequency encoded memory unit based on the switching action of semiconductor optical amplifier (SOA). Nonlinear polarization rotation characters of SOA and ‘SOA based Mach-Zehnder Interferometer’ switch, i.e. ‘SOA-MZI’ switch, are exploited for the purpose of some switching action with least switching power (<−3 dBm) and high switching contrast ratio (20 dB). Here two logic states (‘0’ state and ‘1’ state) of the memory is encoded by two different frequencies, which will remain unchanged throughout the data communication irrespective of loss of light energy due to reflection, refraction, attenuation, etc. Though the SOA based switch runs with the operational speed 100 Gb/s, still due to the presence of the other optical components in the memory unit, the overall speed of the proposed system will come down to 10 Gb/s. 相似文献
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Ian Yulianti Abu Sahmah Mohd. Supa’at Sevia M. Idrus Abdulaziz M. Al-hetar 《Optics & Laser Technology》2010,42(1):180-948
A new digital optical switch (DOS) with large branching angle and short device length that exhibits low crosstalk and low power consumption is demonstrated. The Y-branch shape was optimized by introducing constant effective refractive index difference between branches (ΔNeff) along the propagation direction through beam propagation method (BPM) scheme. To provide decreasing local branching angle that results in the improvement of the crosstalk, two modified cosine bend was introduced to form the Y-branch. The modified cosine branch was then connected to a linear branch. The heater electrode was optimized so that the temperature fields induce a constant ΔNeff to satisfy initial assumption in designing the Y-branch shape. With branching angle of 0.299° and device length of only 5 mm, the simulation shows that the device could exhibits crosstalk of −33 dB at calculated required power of only 26 mW. 相似文献