排序方式: 共有41条查询结果,搜索用时 187 毫秒
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为了有效改善基于无机材料的可变光衰减器(VO A)功耗大以及成本高的问题,设计并研制了一种基于有 机聚合物材料的低功耗马赫-曾德尔干涉仪(MZI)型VOA器件。为保证器件的单模传输,优 化了波导的结构和横截面 尺寸,同时对加热电极的热场分布进行了模拟分析。最后,采用紫外光刻和湿法刻蚀等半导 体工艺,制备出功耗较低、响应速 度较快的VOA器件。在650nm工作波长下,测得器件的衰减为14.6dB,驱动功率仅为12.3mW,器件的上升时间为 240μs, 下降时间为200μs。实验结果表明,采用聚合物材料,并通过对器 件的结构参数进行优化,可研制出工作在可见光波段的低功耗VOA器件。 相似文献
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报道了一种新型基于环形激光腔的增益钳制掺铒光纤放大器。得到了较好的增益钳制效果和增益平坦度,利用980nm半导体激光器泵浦12m长掺铒光纤形成激光增益,观测到
30nm增益带宽。通过反馈1520nm 激光,在可变衰减器不同值测量了输入信号从- 40 ~10dBm的增益,其小信号增益被钳制在16dB。可为40个波分复用(WDM)信道波长提供增益钳制及平坦的放大功能。 相似文献
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Jang‐Uk Shin Young‐Tak Han Sang‐Pil Han Sang‐Ho Park Yongsoon Baek Young‐Ouk Noh Kang‐Hee Park 《ETRI Journal》2009,31(6):770-777
We have developed a fully functional reconfigurable optical add‐drop multiplexer (ROADM) switch module using a polymer integrated photonic lightwave circuit technology. The polymer variable optical attenuator (VOA) array and digital optical switch array are integrated into one polymer PLC chip and packaged to form a 10‐channel VOA integrated optical switch module. Four of these optical switch modules are used in the ROADM switch module to execute 40‐channel switching and power equalization. As a wavelength division multiplexer (WDM) filter device, two C‐band 40‐channel athermal arrayed waveguide grating WDMs are used in the ROADM module. Optical power monitoring of each channel is carried out using a 5% tap PD. A controller and firmware having the functions of a 40‐channel switch and VOA control, optical power monitoring, as well as TEC temperature control, and data communication interfaces are also developed in this study. 相似文献
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光可变衰减器的研究进展 总被引:2,自引:0,他引:2
光可变衰减器(VOA)作为波分复用(WDM)网络中关键的功率管理器件,能够实现信道均衡和自动增益控制功能.微电机械系统(MEMS)型和热光型VOA以其衰减范围宽、功耗低、体积小、易于集成等优点成为研究重点,热光特性极佳的聚合物材料则成为最引人注目的热光材料.文章对已有的VOA器件作了概括分类,介绍了各种MEMS型VOA,还从热光材料的角度,总结了聚合物材料的研究成果,对已见报道的基于聚合物的各种热光型VOA进行了重点的描述和分析.最后给出了VOA的两种网络实例. 相似文献
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This paper examines the closed-loop characteristics of the basic Current-Feedback Operational Amplifier (CFOA), and in particular, the dynamic response. Additionally, it also examines the design and advantages of the CFOA regarding its ability to provide a significantly constant closed-loop bandwidth for closed-loop voltage gain. Secondly, the almost limitless slew–rate provided by the class AB input stage that makes it superior to the voltage-mode operational amplifier (VOA) counterpart. Additionally, this paper also concerns the definitions and measurements of the terminal parameters of the CFOA, regarded as a ‘black box’. It does not deal with the way that these parameters are related to the properties of the active passive and active components of a particular circuit configuration. Simulation is used in terminal parameter determination: this brings with it the facility of using test conditions that would not normally prevail in a laboratory test on silicon implementations of the CFOAs. Thus, we can apply 1mA and 1mV test signals from, respectively, infinite and zero source impedances that range in frequency from d.c to some tens of GHz. Also, we assume the existence of resistors with identical Ohmic value and very high value ideal capacitors. Where appropriate, practical test methods are referred to physical laboratory prototypes. 相似文献
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研制了一种基于SFP(Small Form-factor Pluggable)封装的数字可调光衰减器(VOA)模块。该可调光衰减器模块集成了微电子机械系统(MEMS)式的可调光衰减器(VOA)和精密电控制单元,采用标准的SFP封装和接口,实现小型化可插拔,高精度数字化衰减功能。该VOA不仅具有SFP器件特有的高集成度和灵活配置等特点,支持热插拔和即插即用,同时还具有MEMS光衰减器固有的反应速度快、线性度好、高稳定性、高衰减等光学性能,因此在光网络通信设备和光传输系统中具有广泛的应用前景。 相似文献
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