Jiang Meng, Zhang A Ping, Wang Yang-Chun, Tam Hwa-Yaw, He Sailing
Center for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instruments, Zhejiang University, Hangzhou 310058, China.
Opt Express. 2009 Sep 28;17(20):17976-82. doi: 10.1364/OE.17.017976.
A long-period grating (LPG) based compact optical fiber sensor working in reflection mode is demonstrated. A technique to make a mirror on the cladding region of a fiber end-face to reflect only the cladding modes was realized by growing a polymeric microtip on the core region of the fiber end-face, by photopolymerization, followed by coating the fiber end-face with an aluminum film. Using the cladding-mode-selective fiber end-face mirror, the transmission spectrum of the LPG was "inverted" and reflected. Preliminary results of using the sensor to measure the refractive index of glycerol/water solutions were successfully demonstrated.
展示了一种基于长周期光栅（LPG）的紧凑型反射模式光纤传感器。通过在光纤端面的纤芯区域光聚合生长聚合物微尖端，随后在光纤端面上涂覆铝膜，实现了一种在光纤端面包层区域制作仅反射包层模式的反射镜的技术。利用这种包层模式选择性光纤端面反射镜，LPG的透射光谱被“反转”并反射。成功展示了使用该传感器测量甘油/水溶液折射率的初步结果。
