基于非线性放大环镜和Lyot滤波器的多波长与耗散孤子锁模态开关型掺铥光纤激光器

State-switchable Multi-wavelength and Dissipative Soliton Mode-locked Tm-doped Fiber Laser Based on a Combination of Nonlinear Amplifying Loop Mirror and Lyot Filter

报道了一种基于非线性放大环镜和Lyot滤波器技术的态开关型掺铥光纤激光器.通过仔细调节偏振控制器和泵浦功率,掺铥光纤激光器可以分别在多波长态和耗散孤子锁模态运行,并且两种态之间可以相互切换.对于多波长态,在光谱半功率值范围内能生成8个稳定的波长;对于耗散孤子锁模态,在1996 nm的中心波长处产生脉冲能量高达41.49 nJ,脉冲持续时间为2.4 ns,光谱带宽为29 nm的耗散孤子.不同运行态间的切换归因于偏振控制器导致的非线性放大环镜的功能的改变.

This paper demonstrates a state-switchable Tm-doped fiber laser based on nonlinear amplifying loop mirror and Lyot filter technique.By properly adjusting the polarization controller and pump power,the Tm-doped fiber laser can operate in multi-wavelength state and dissipative soliton mode-locked state,respectively.And two types of operating states can be switched to each other.For multi-wavelength state,8 stable wavelength peaks are generated within half of peak power variation.For the dissipative soliton mode-locked state,the dissipative soliton with pulse energy as high as 41.49 nJ,the pulse duration of 2.4 ns,and the spectrum bandwidth of 29 nm is generated at the center wavelength of 1996 nm.The switching between different operating states is due to the change in the function of the nonlinear amplifying loop mirror caused by the polarization controller.