【摘要】 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.更多还原

【Abstract】 Variable optical attenuator(VOA)is a key power controlling device which can realize channel equalization and automatic gain control(AGC). Owing to common characteristic of wide dynamic range, low power consumption, compactness and convenience of integration, micro-electromechanical system(MEMS) and thermooptic are important techniques for VOA. Polymer with optimum thermooptic coefficient became the most attractive thermooptic materials. We classified the presented VOA firstly. Various MEMS-type VOA were introduced. We also summarized the developments of polymer, and from the angle of thermooptic material, emphasized on the analysis of various polymer-based thermooptic VOA. Two application instances in optical network were presented lastly.更多还原