借助1×3光开关和可调F-P滤波器对充当环形腔激光器端镜的3×10空、波分复用光纤光栅传感器阵列进行查询,用非平衡Michelson扫描干涉仪将来自传感光栅的波长漂移信息变为相移信息实现解调,实验证实系统的应变传感灵敏度为1.6817 Deg/με,与理论值1.6843 Deg/με非常吻合.锁定来自某一光栅的信号后,反馈装置保证系统具备自动追踪感测信号的能力.

A spatial/wavelength division multiplexed 3×10 fiber Bragg grating sensor array, acted as the reflector of a ring cavity fiber laser, was interrogated by employing a 1×3 optical switch and a tunable F P filter. Demodulation was achieved by using an unbalanced Michelson scanning interferometer that transform the wavelength shift signal induced by the measured strain into phase shift signal. The sensor sensitivity of the system was demonstrated to be 1 6817 Deg/με, which agree with the theoretical value of 1.6843 Deg/με well. A feedback subsystem was introduced to make the system track the measuring channel automatically.