测量光纤有效弹光系数的一种新方法  

New method of measuring fibers' valid elastic-optic constant

作　　者：彭保进[1] 廖延彪[2] 张敏[2] 沈亚强 金洪震[1] 赖淑蓉[2] 

机构地区：[1]浙江师范大学信息光学研究所,金华321004 [2]清华大学电子工程系,北京100084

出　　处：《光学技术》2005年第5期655-658,共4页Optical Technique

基　　金：海洋863项目(No.2001AA602011-11);浙江省科技计划项目(No.2005C31011)

摘　　要：针对目前许多新型光纤有效弹光系数测量的需要,报导了用光纤布喇格光栅(FBG)传感器测量光纤有效弹光系数的新方法。用一个温度参考光栅、一个测量光栅和一已知膨胀系数的材料,结合光纤布喇格光栅的特有性质进行了测量。建立了实验系统,实验结果表明,系统可以有效地解决温度与应变对光栅存在交叉敏感的问题,成功地测出了光纤有效弹光系数,测量误差小于1.3%。A new way to measure fibers＇ valid elastic-optic constant was presented which is based on optical fiber Bragg grating sensor. The method caters for the need of measuring new-style fibers＇ valid elastic-optic constants presently. The constant was measured by a temperature referrence gratin, a measuremental grating and one material known of expansion coefficient, combining with the characteristic of fiber Bragg grating. Experimental setup and measurement principle were discussed. The result of experiment proved that the system can solve the existent cross sensitive problem which caused by temperature and the strain effectively. The fiber＇s valid elastic-optic constants was measured successfully. The result of the error is smaller than 1.3 %.

关 键 词：光纤布喇格光栅 应变 有效弹光系数 光电检测 

分 类 号：O435.1[机械工程—光学工程]