CAJ | 학술논문

本文介绍了一种光纤干涉系统，该系统适用于数字化变电站等的周界报警。该周界报警系统以单模光纤为传感光纤，光纤末端连接有法拉第旋光镜作为反射元件。当周界附近有入侵信号作用于光纤上时，入侵信号会对光纤中光波的相位产生两次调制，连接在3×3耦合器上两条光纤中的光信号因调制时间不同在返回耦合器时发生干涉，通过解调该干涉信号最终实现入侵点的定位，实验结果显示系统具有很好的测量精度。
본문개소료일충광섬간섭계통，해계통괄용우수자화변전참등적주계보경。해주계보경계통이단모광섬위전감광섬，광섬말단련접유법랍제선광경작위반사원건。당주계부근유입침신호작용우광섬상시，입침신호회대광섬중광파적상위산생량차조제，련접재3×3우합기상량조광섬중적광신호인조제시간불동재반회우합기시발생간섭，통과해조해간섭신호최종실현입침점적정위，실험결과현시계통구유흔호적측량정도。
A fiber interference system is introduced in this paper,this system is suitable for digital substation and other perimeter.The perimeter alarm system uses single mode fiber as the sensing fiber,the Faraday rotation mirrors are connected to the fiber ends as the reflective elements.When the intrusion signal is applied to the fiber near the perimeter,the intrusion signal will modulate the optical phase in the fiber for twice,two optical signals connected to the coupler occur interference for different modulation time,and we achieve positioning of the intrusion point by demodulating the interference signal. Experimental results show that the system is of good accuracy.