被动锁模光纤激光器自锁模偏振搜索算法设计  

Design of Self-mode-locked Polarization Search Algorithm for NPR Fiber Laser

作　　者：周琦 苏成志 马万卓 ZHOU Qi;SU Chengzhi;MA Wanzhuo(Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学,长春130000

出　　处：《激光杂志》2022年第9期32-37,共6页Laser Journal

基　　金：国家自然科学基金青年基金(No.62005024);吉林省教育厅科学技术研究项目(No.JJKH20210816KJ);吉林省青年科技人才托举工程(No.QT202104)。

摘　　要：针对非线性偏振旋转(NPR)被动锁模光纤激光器自锁模偏振搜索效率低的问题,设计了一种偏振搜索算法。首先建立了压电陶瓷(PZT)式三单元级联型偏振控制器的理论模型,并基于该模型确定了锁模区域对应的电压调控范围,集中搜索激光器锁模点邻近区域,最后通过双区域计数算法,实现了搜索步长的自适应调整。结果表明,对于重复频率为7.12 MHz的NPR型光纤激光器,从自由运行到基频锁模(FML)的最短偏振搜索时间1.2 s,达到了高效搜索NPR光纤激光器锁模偏振的设计目的。Aiming at the problem of low polarization search efficiency of nonlinear polarization rotation(NPR)automatic passive mode-locked fiber laser,a polarization search algorithm is designed.Firstly,the theoretical model of piezoelectric ceramic(PZT)three-element cascaded polarization controller is established.Based on the model,the voltage control range corresponding to the mode-locked region is determined,and the adjacent region of the laser mode-locked point is searched.Finally,the adaptive adjustment of the search step length is realized by the double region counting algorithm.The results show that for the NPR fiber laser with repetition rate of 7.12 Mhz,the shortest polarization search time from free operation to fundamental frequency mode-locking(FML)is 1.2 s,which achieves the design purpose of searching the mode-locking polarization of NPR fiber laser efficiently.

关 键 词：非线性偏振旋转 光纤激光器 自锁模 偏振搜索算法 偏振控制器 

分 类 号：TN248.1[电子电信—物理电子学]