摘要
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 6 817Deg με,与理论值 1 6 843Deg 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 agrees with the theoretical value of 1.6843 Deg/μΕ well. A feedback subsystem was introduced to make the system track the measuring channel automatically.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2002年第2期131-134,共4页
Chinese Journal of Lasers
基金
香港研究资助局 (RGC)资助项目 (Polyu 5 12 3 97E)
国家自然科学基金与中国节能投资公司联合基金的部分资助 (批准号 :6 0 1770 2 9)
关键词
光纤光栅
传感网络
空分复用
有源波
Demodulation
Feedback
Light interference
Ring lasers
Sensors
Wavelength division multiplexing
