涂覆层对高频CO_2激光刻写长周期光纤光栅的影响  

Effect of coat to long-period fiber gratings written by high-frequency CO_2 laser pulses

作　　者：江柳清[1] 朱国良[1] 江超[1] 

机构地区：[1]湖北师范学院物理与电子科学学院,湖北黄石435002

出　　处：《湖北师范学院学报（自然科学版）》2015年第4期64-68,共5页Journal of Hubei Normal University(Natural Science)

基　　金：湖北师范学院2015年研究生创新基金资助;湖北师范学院2015年创新团队项目资助(T201502)

摘　　要：研究涂覆层对高频CO_2脉冲激光刻写长周期光纤光栅的影响。实验表明:在带涂覆层的光纤上刻写光栅时,光栅的谐振波长、峰值损耗和附加损耗的变化更趋平缓,而且平均损耗更小;涂覆层的存在会提高光栅的机械强度,但会增加刻写次数,易造成光栅刻写位置发生微小偏移。The effects of coat to long - period fiber grating written by high - frequency CO2 laser pulses were studied in the paper. The experiment results showed that long - period fiber gratings written on coated fiber of its resonant wavelength, peak loss and additional loss not only changed smoothly, but also had a smaller average additional loss. Coats of fiber gratings could improve the gratings＇mechanlcal characteristics, but it would need more times to writing, which may make the writing point have a tiny shift.

关 键 词：长周期光纤光栅 高频CO2 脉冲激光 涂覆层 附加损耗 

分 类 号：TN29[电子电信—物理电子学]