Observation of square- and h-shaped pulse from a mode-locked erbium-doped fiber laser.
Observation of square- and h-shaped pulse from a mode-locked erbium-doped fiber laser.
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DOI：
10.1364/ao.423380
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发表时间：
2021-04
期刊：
影响因子：
1.9
通讯作者：
Zhengqi Xu;Dongfang Jia;Zhaoying Wang;Chunfeng Ge;Tianxin Yang
中科院分区：
文献类型：
--
作者：
Zhengqi Xu;Dongfang Jia;Zhaoying Wang;Chunfeng Ge;Tianxin Yang
We demonstrate the generation of a type of square-shaped pulse in a passively mode-locked erbium-doped fiber laser based on the nonlinear optical loop mirror technique. Through adjusting the pump power and polarization state, square-shaped pulses are generated. Furthermore, we investigate the pulse profile in relation to the optical spectrum. By filtering out short-wavelength spectrum components gradually, pulse shaping is achieved, and the top of the square-shaped pulse becomes flat. Subsequently, by filtering out long-wavelength spectrum components, a type of h-shaped pulse is obtained and the formation reason is also investigated.
