研制了一种宽调谐光纤光栅滤波器(FBG).该滤波器通过光纤插芯导引光栅,利用轴向压缩技术,实现了25 nm的调谐.调谐过程中,FBG布拉格波长改变量与微位移台调节量呈良好的线性关系,FBG反射率波动小于0.59 dB,3 dB带宽波动小于0.1 nm,装置稳定性较好,布拉格波长在30 min内的漂移量小于0.07 nm.
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