硒化钨在保偏调Q光纤激光器中的稳定性研究  

Investigation on Stability of WSe_2-PVA in an All Polarization Maintaining Q-Switched Fiber Laser

作　　者：郭超世 陈博华[1] 王昊[1] 吴侃[1] 陈建平[1] 

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《中国激光》2017年第7期193-200,共8页Chinese Journal of Lasers

摘　　要：将二维材料硒化钨(WSe_2)与聚合物聚乙烯醇(PVA)混合制成饱和吸收体薄膜,在掺铒保偏光纤激光器中实现了稳定的调Q运转。全保偏的腔体能够最大程度减少环境对激光腔双折射的扰动,在此基础上,研究了硒化钨聚乙烯醇(WSe_2-PVA)饱和吸收体薄膜在调Q运转中的稳定性。研究发现,当材料中的热量累积到一定阈值后,聚合物基底材料首先进入熔融状态,随后热量在薄膜中进一步累积,导致硒化钨受热损坏,表现为饱和吸收体薄膜的损耗急剧增加。In this paper, we fabricated thin-film saturable absorber by mixing 2D material tungsten diselenide （WSe2） and polymer polyvinyl alcohol （PVA）. The WSe2-PVA saturable absorber （SA） was incorporated in an erbium-doped polarization maintaining （PM） fiber laser, and stable Q-switched operation was realized. An all PM cavity can reduce environmental perturbation on the cavity birefringence. Based on this PM cavity, we investigated the stability of WSe2-PVA SA in the Q-switched operation. It is found that when the heat accumulation reached a certain threshold in the SA, the polymer substrate firstly melted and more heat accumulateed quickly. As a result, WSe2 was damaged, showing a significant increase of SA loss.

关 键 词：激光器 调Q 非线性光学材料 保偏光纤 

分 类 号：TN248[电子电信—物理电子学]