光学逆向调制器件性能研究

Performance Research of optical modulating retro-reflector device

光学逆向调制器是逆向调制光通信系统的核心器件,设计并搭建实验系统,分别对压电陶瓷片和微机电系统(MEMS)逆向调制器进行了频率响应特性和输入输出线性特性的测试。测试结果表明,压电陶瓷片的频率响应不平坦,调制速率低,带宽为4 kHz,线性度差; MEMS逆向调制器的频率响应较为平坦,调制速率能达到180 kpbs,部分区间线性度好,判定系数R2为0. 974 6,更适合用于逆向调制光通信系统中。

Modulating retro-reflector is the key device to MRR Lasercom Systems and their performance are introduced. An experiment system is designed and established to test magnitude-frequency characteristic and in-out linear characteristic of piezoelectric ceramics and macro-electro-mechanical system modulating retro-reflector. The results show that the frequency response of piezoelectric ceramics is not smooth,modulate rate is low,bandwidth is about4 kHz,linearity is unsatisfactory. While the frequency response of MEMS modulating retro-reflector is flat,its linearity of some part is favorable,determination coefficient R^2 reaches to 0. 974 6,it can be applied in modulating retro-reflector laser communication.