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长周期光纤光栅扭曲传感器
引用本文:王义平,饶云江,胡爱姿,曾祥楷,冉曾令,朱涛.长周期光纤光栅扭曲传感器[J].光学学报,2002,22(9):096-1099.
作者姓名:王义平  饶云江  胡爱姿  曾祥楷  冉曾令  朱涛
作者单位:重庆大学光电工程学院,重庆,400044
基金项目:国家杰出青年科学基金 (6 0 0 2 5 5 15 )资助课题
摘    要:发现用高频CO2激光写入的长周期光纤光栅的谐振波长会随光栅扭曲而线性变化。当顺时针扭曲时,谐振波长向长波方向漂移;逆时针扭曲时,谐振波长向短波方向漂移。该新型扭曲传感器不但能实现对扭曲率的直接测量,而且能判断扭曲方向,因此具有广泛的应用前景。

关 键 词:长周期光纤光栅  扭曲传感器  光纤传感器  扭曲率
收稿时间:2001/10/4

A Novel Long-Period Fiber Grating Torsion Sensor
Wang Yiping,Rao Yunjiang,Hu Aizi,Zeng Xiangkai,Ran Zengling,Zhu Tao.A Novel Long-Period Fiber Grating Torsion Sensor[J].Acta Optica Sinica,2002,22(9):096-1099.
Authors:Wang Yiping  Rao Yunjiang  Hu Aizi  Zeng Xiangkai  Ran Zengling  Zhu Tao
Abstract:A novel torsion sensor based on a long-period fiber grating (LPFG) written by high-frequency CO 2 laser pulses is demonstrated. The resonant wavelength shifts linearly toward longer wavelength as the LPFG is twisted clockwise, whereas it shifts toward linearly shorter wavelength as the LPFG is twisted anticlockwise. Such a torsion sensor can, not only measure the applied twist rate directly, but also determine the twist direction. Accordingly, this all-fiber absolute torsion sensor could find important engineering applications in the field of smart structures where the ability for the sensor to be embedded into the structure is critical.
Keywords:long-period fiber gratings  torsion sensors  optical fiber sensors  twist rate
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