基于周期压力写入的长周期光纤光栅的一阶光学微分器  

A 1^(st)-order optical differentiator based on periodical pressure-induced long-period fiber grating

作　　者：石胜辉[1,2] 赵明富[1,2] 罗彬彬[1,2] 陈立功[1,2] 周晓军[3] 

机构地区：[1]重庆理工大学光纤传感与光电检测重庆市重点实验室,重庆410054 [2]重庆理工大学电气与电子工程学院,重庆400054 [3]电子科技大学光电信息学院,四川成都610054

出　　处：《光电子．激光》2017年第2期133-137,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(51276209,61505017);重庆市科委基础与前沿研究(cstc2014jcyjA0081;cstc2015jcyjA40035);重庆市教委科学技术研究(KJ1400942)资助项目

摘　　要：根据一阶光学微分器的传递函数,理论分析了均匀长周期光纤光栅(LPFG)作为一阶瞬态光学微分器应满足的条件。周期压力产生的LPFG能够通过压力的控制加强光栅的模式耦合,因而得到大的光栅谐振损耗,实验证明了周期压力在细径光纤上产生的LPFG能够产生大于50dB的谐振损耗。数值模拟结果表明,此光栅光学微分器能够高精度地完成对高斯脉冲的微分运算,在超快全光信号处理、飞秒脉冲整形和任意光脉冲产生等领域中有宽广的应用前景。According to the transfer function of a first-order differemiator, the condition of a uniform long p-riod fiber grating （LPFG） as a first-order temporal optical differentiator is theoretically analyzed in this paper. The mode coupling in the periodical pressure-induced LPFG,which is formed by pressing a single mode fiber between a fiat plate and a V-shaped periodically grooved plates, can be enhanced by controlling the periodical pressure applied on the fiber, and then a large resonant loss of the LPFG can be obtained. The periodical pressure-induced LPFG in a small diameter fiber with the resonant loss larger than 50 dB is experimentally demonstrated. The simulated results show that the grating is capable of completing differential operation for Gauss optical pulse with high precision. The periodical pressure-in- duced LPFG has potential applications in the fields of ultrafast all-optical signal processing,femtosecond optical pulse shaping,arbitrary optical pulse generation,and so on.

关 键 词：光纤光学 微分器 周期压力 长周期光纤光栅(LPFG) 

分 类 号：TN253[电子电信—物理电子学]