应力长周期光纤光栅透射谱中旁瓣的抑制  

Sidelobe Suppresion of Mechanically-induced Long-period Fiber Gratings

作　　者：王新伟[1,2] 盛秋琴[1] 

机构地区：[1]南开大学物理科学学院,天津300071 [2]中国科学院半导体研究所光电系统实验室,北京100083

出　　处：《光子学报》2008年第11期2198-2202,共5页Acta Photonica Sinica

基　　金：南开大学本科生创新科研百项工程资助

摘　　要：提出一种优化应力长周期光纤光栅的实验方法.利用自行研制的机械结构,通过点接触施力写制应力长周期光纤光栅,并通过压力板V-M型形变实现优化MLPFG传输谱的n维调节,有效抑制了应力长周期光纤光栅传输谱中的旁瓣.当损耗峰LP05损耗强度为9.0dB时,边模抑制比大于8.6dB;同时,提出并实现了一种通过空气薄层形成的等厚干涉条纹来监测光纤上力分布的光学方法,从而为传输谱的优化提供有效参量.A new method to optimize mechanically-induced long-period fiber grating （MLPFG） transmission spectra was demonstrated. By the mechanism designed by ourselves, MLPFGs were written by pointcontact pressure, and the n-dimensional modulation of MLPFG are realized by the V M deformation of pressure plates. Sidelobes in MLPFG transmission spectrum are suppressed effectively： when the loss of LP05 reaches 9. 0 dB, the sidelobe suppression ration is larger than 8. 6 dB. Meanwhile, a method of monitoring the stress distribution along the grating fibers is given by the air film equal thickness interference,which offers effective parameters for MLPFG n-dimensional modulation.

关 键 词：应力长周期光纤光栅 传输谱 旁瓣 干涉条纹 

分 类 号：TN253[电子电信—物理电子学]