飞秒激光刻写FBG在电极放电下的光谱特性

发布时间：2018-04-15 12:19

本文选题：光纤布拉格光栅 + 飞秒激光　；参考：《激光与红外》2017年01期

【摘要】：采用电极脉冲电弧放电对紫外激光和飞秒激光刻写的光纤布拉格光栅(FBG)进行高温激励的研究,实验发现,紫外激光刻写的FBG,光栅透射谱大幅下降,光谱蓝移0.38 nm,飞秒激光刻写的FBG透射谱基本保持不变,光谱红移0.022 nm。特别是当电极在栅区中心位置放电时,光栅透射率上升达到最大,比无电极放电时大8 d B,表现出开关量特性。该特性在光纤开关量器件、光纤调Q激光器、新型光纤光栅解调与局部放电检测等领域具有潜在的应用前景。
[Abstract]:The high temperature excitation of fiber Bragg gratings (FBGs) written by ultraviolet laser and femtosecond laser was studied by electrode pulse arc discharge. The experimental results show that the transmission spectrum of FBGs is greatly decreased when the FBGs are written by UV laser.The blue shift of the spectrum is 0.38 nm, and the FBG transmission spectrum recorded by femtosecond laser remains basically unchanged, and the spectral red shift is 0.022 nm.Especially when the electrode discharges at the center of the gate, the grating transmittance increases to the maximum, which is 8 dB larger than that of the non-electrode discharge, showing the characteristic of switching quantity.This characteristic has potential applications in the fields of fiber switching devices, fiber Q-switched lasers, novel fiber grating demodulation and partial discharge detection.
【作者单位】：北京信息科技大学光电信息与仪器北京市工程研究中心光电测试技术北京市重点实验室;北京信息科技大学生物医学检测技术及仪器北京实验室;
【分类号】：TN253

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