论文部分内容阅读
一、前言单模光纤因其有非常宽的传输频带,可以期待作为一种主要方式而活跃于未来的光通信系统。为充分利用这一宽频带特性,可在接收端进行光外差法检波。实行光外差法时,信号光和本振光的偏振面最好一致。因此,在考虑长距离通信时,要求信号通过光纤作长距离传输后,出射端的偏振面也能保持稳定。除光外差法外,对于光纤和集成光路的耦合、激光器及陀螺仪来说,
I. INTRODUCTION Because single-mode optical fiber has a very wide transmission band, single-mode optical fiber can be expected to be an optical communication system active in the future as a major mode. To take full advantage of this broadband feature, the receiver can be detected by optical heterodyne method. The implementation of optical heterodyne method, the signal light and the polarization plane of the light is best consistent. Therefore, when considering the long-distance communication, it is required that the signal plane be transmitted through the optical fiber for long distance transmission, and the polarization plane of the outgoing end can also be kept stable. In addition to the optical heterodyne method, for optical fiber and integrated optical coupling, laser and gyroscope,