基于闪耀光纤光栅的折射率传感技术实验研究  

Refractive Index Measurement Based on Blazed Fiber Bragg Grating

作　　者：张键[1] 刘波[1] 金龙[1] 徐玲玲[1] 开桂云[1] 

机构地区：[1]南开大学现代光学研究所教育部光电信息技术科学重点实验室,天津300071

出　　处：《光子学报》2008年第5期910-913,共4页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(863计划)(2006AA01Z217);天津市高等学校科技发展基金(20060609);光电信息技术教育部重点实验室开放基金资助

摘　　要：提出了一种基于闪耀光纤光栅传感技术的折射率测量新方法,即采用SLED作为光源,通过检测闪耀光纤光栅透射谱强度实现折射率的测量。实验证明,当环境折射率在1.3723-1.4532之间变化时,闪耀光纤光栅透射功率从0.611-0.472mW线性下降,其灵敏度达到1.718μW/（0.001折射率变化）。该检测方法具有结构简单、无需波长检测、灵敏度高、易于工程化等优点。A new method for measuring refractive index based on blazed fiber Bragg grating was demonstrated. Took SLED as the source, the measurement of the refractive index is dependent on the measurement of the transmission power of the blazed fiber Bragg grating. When the refractive index is changed between 1. 372 3 and 1. 453 2, the transmission power of the blazed fiber Bragg grating is decreased from 0. 611 mW to 0. 472 mW linearly and the sensitivity reaches 1. 718 μW/（0. 001 index changed）. The method has the characteristic of simpleness, high sensitive and it will have a good future on index measurement.

关 键 词：光传感 闪耀光纤光栅 折射率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]