Chinese Optics Letters, 2019, 17 (12): 121405, Published Online: Dec. 5, 2019  

Mode-locked pulse generation from an all-FMF ring laser cavity Download: 765次

Author Affiliations
Advanced Photonic Technology Laboratory, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
Abstract
Experimental generation of stable mode-locked pulses and cylindrical vector beams (CVBs), from an all few-mode fiber (FMF) ring laser is first reported, to the best of our knowledge. In this laser, a section of few-mode erbium-doped fiber (FM-EDF) is used as the gain medium. The FM-EDF is pumped by 976 nm laser with LP11 mode, which is simultaneously converted and multiplexed through a homemade hybrid device, i.e., wavelength division multiplexing-mode selection coupler (WDM-MSC). All the components in our experiment are connected using FMF. The resulted CVB pulses have a spectral width of 0.33 nm with a repetition rate of 30.58 MHz under the pump power of 340 mW. Moreover, both azimuthally and radially polarized CVBs were achieved with a high purity of >95%. This mode-locked CVB fiber laser with an all FMF configuration opens the way to manipulate the transverse mode in mode-locked fiber lasers.

Su Chen, Weixiang Hu, Yang Xu, Yu Cai, Zhiqiang Wang, Zuxing Zhang. Mode-locked pulse generation from an all-FMF ring laser cavity[J]. Chinese Optics Letters, 2019, 17(12): 121405.

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