环境变温下光纤布拉格光栅解调中滤波器扫描波动抑制研究  

Suppression of Sweeping Fluctuation of Filter in Fiber Bragg Grating Demodulation Under Temperature Changing Environment

作　　者：江俊峰[1] 闫金玲[1] 王双[1] 刘琨[1] 刘铁根[1] 臧传军[1] 谢仁伟[1] 何盼[1] 楚奇梁 潘玉恒[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,光纤传感研究所,天津300072

出　　处：《光学学报》2016年第12期27-34,共8页Acta Optica Sinica

基　　金：国家重大科学仪器设备开发专项(2013YQ030915);国家973计划(2010CB327802);国家自然科学基金(61227011,61378043,61475114,61505139);教育部科学技术研究重大项目(313038);天津市自然科学基金(13JCYBJC16200);深圳市科技创新委员会课题(JCYJ20120831153904083);中国空间技术研究院CAST创新基金

摘　　要：针对可调谐光纤法布里-珀罗滤波器(FFP-TF)在环境温度变化过程中扫频非线性曲线的随机波动增大,引起光纤布拉格光栅(FBG)传感系统解调不稳定的现象,提出了基于光纤迈克耳孙辅助干涉仪的一种稳定解调性能的方法,通过辅助干涉仪实现了对法布里-珀罗标准具光波长间隔的细分,编制了局部光频细分解调算法。利用搭建的光谱周期为9.53GHz的辅助干涉仪进行了变温解调实验研究,结果表明,以往未引入光纤辅助干涉仪的波长解调值波动的最大幅度为±28.5pm,标准差为8.6pm;引入辅助干涉仪的波长解调值波动的最大幅度为±3.5pm,标准差为1.4pm,有效提高了变温过程中的光纤光栅传感解调波长稳定性。For the random fluctuation of nonlinearity curve of fiber Fabry-Perot tunable filter（FFP-TF）increasing in temperature changing environment,which results in the instability of fiber Bragg grating（FBG）demodulation system,a novel method based on auxiliary optical fiber Michelson interferometer（AFMI）to stabilize demodulation performance is proposed.The optical frequency subdivision in wavelength interval of Fabry-Perot etalon is achieved,and the demodulation algorithm by local optical frequency subdivision is compiled.Under temperature changing environment,we investigate amplitude of fluctuation by an AFMI,whose spectral interval is 9.53 GHz.The experiment shows that the amplitude of fluctuation is±28.5 pm without AFMI,and standard deviation is 8.6 pm.However,the amplitude of fluctuation is±3.5 pm with AFMI,and standard deviation is 1.4 pm.The wavelength demodulation stability of fiber Bragg grating in temperature-variable situation is effectively improved.

关 键 词：光纤光学 光纤传感器 辅助干涉仪 变温 光纤布拉格光栅 非线性 

分 类 号：O433.1[机械工程—光学工程]