一种光纤光栅气压调谐方法

A Method for Fiber Bragg Grating Wavelength Tuning by Pressure

摘要: 为了便于对光纤光栅的布喇格波长进行调谐,设计了一种光纤光栅气压调谐方法.通过改变密封气体的压力改变光栅的应变,从而调谐光栅的布喇格波长.推导了调谐所用公式,布喇格波长漂移与调谐量近似成线性关系.实验获得了5.4 nm的调谐范围,实验结果和理论符合很好,线性拟合度分别为0.998 2和0.998 9.

Abstract: A new method for fiber Bragg grating wavelength tuning is reported. The Bragg wavelength is tuned by the change of strain induced by tuning the pressure of closed gas with two different ways. The relation between wavelength and tuning variable is approximately linear and the experimental results is in good consistence with theory. The wavelength range of linear tuning is about 5.4 nm, and the linear consistency R²=0.998 2 and 0.998 9 respectly. This method has the advantages of simple structure and easy realization.