1060nm啁啾可调谐方波脉冲光纤激光器

Chirp adjustable 1060nm square-wave pulse fiber laser

提出一种耗散孤子共振脉冲与随机啁啾脉冲可调的方波光纤激光器,并搭建一个全光纤啁啾测量系统来研究其输出啁啾特性。实验结果表明,通过调节腔内偏振控制器可产生耗散孤子共振脉冲和随机啁啾方波脉冲。耗散孤子共振脉冲光谱具有陡峭的边沿且光谱中央存在尖峰,脉冲中央部分为较小的线性啁啾,边缘部分为较大的非线性啁啾。随机啁啾脉冲没有明确的啁啾分布,其光谱形状和光谱宽度几乎不随抽运功率而变化。

The adjustable generation of dissipative soliton resonance pulse and randomly chirped pulse in a square-wave fiber laser is proposed and demonstrated.A chirp measurement system is employed to investigate the output chirp characteristics.The results show that the adjustable generation of dissipative soliton resonance pulse and randomly chirped pulse can be achieved by adjusting the polarization controller inside cavity.The spectrum of dissipative soliton resonance pulse has a pedestal with two steep edges and a narrow spike,and the corresponding pulse chirp is linear and low at the central part while nonlinear and large at the edges.The chirp of randomly chirped pulse is irregular,and the spectral shape and width hardly change with the pump power.