小型化双同轴多谐振腔体滤波器，采用同轴的结构，尽量减小腔体的体积，优化腔体的Q值，保证设计指标参数，通过软件仿真优化相应的技术指标

Based on the second-order nonlinearity, we present a bidirectional tunable all-optical switch at C-band by introducing backward quasi-phase-matching technique in Mg-doped periodically poled lithium niobate (MgO:PPLN) waveguide with a nano-structure called multiple resonators. Two injecting forward lights and one backward propagating light interact with difference frequency generations. The transmission of forward signal and backward idler light can be modulated simultaneously with the variation

介绍了一种1530 nm透射、1560 nm反射和45°工作列近红外分色片的设计与制备方法。选择Ta2O5和SiO2两种光学薄膜材料，采用多谐振腔法布里珀罗（F-P）窄带滤光片结构作为初始膜系，并选择4H作为谐振腔的间隔层进行消偏振设计，实现分色片透、反射过渡区域的压缩。采用电子束蒸发加离子辅助沉积技术，并应用光学极值法监控各膜层厚度，实现分色片多层膜的制备。利用分光光度计对分色片的光谱进行了分析测试，结果表明研制出的分色片在工作波长的光学能量传递效率高于92%，适用于空间激光通信系统中不同波长信号的分离与高效传递。