광 시간 영역 반사계 시스템을 이용한 멀티 포인트 측정용 광섬유 과열 감지 센서

We proposed and demonstrated a multi-point measuring optical fiber overheating detection sensor using optical time domain refrectometry. With increased of temperature the optical fiber is bended by a bi-metal and it result in optical leaky loss of the fiber occurs. The sensor is designed in such a way that optical bending loss of optical single mode occurs at a critical temperature and magnitude of optical bending loss controlled for multi-pointing sensing.