Abstract

We demonstrated an all-fiber multiwavelength mode-locking thulium-doped fiber laser employing a cascaded single-mode step-index multimode-graded-index multimode single-mode-fiber (SMF-SIMF-GIMF-SMF) saturable absorber (SA). Based on the linear and nonlinear multimode interference effect of the proposed device, this structure can act both as a filter and as a SA. A stable triwavelength (1857/1897/1934 nm) mode-locking operation with the adjacent wavelength interval of approximately 40 nm was obtained. The triwavelength mode locking can also be quickly switched either pair-by-pair or one-by-one by adjusting the polarization controller properly. Our results indicate that the SMF-SIMF-GIMF-SMF structure provides a simpler and more compact solution for switchable multiwavelength mode locking in fiber lasers.

© 2019 Optical Society of America

Generation of pulse-width controllable dissipative solitons and bound solitons by using an all fiber saturable absorber

Zhaokun Wang, Liujiang Li, D. N. Wang, Zichun Le, Shuqin Zhang, Shiying Cao, and Zhanjun Fang
Opt. Lett. 44(3) 570-573 (2019)

Continuously wavelength-tunable mode-locked Tm fiber laser using stretched SMF-GIMF-SMF structure as both saturable absorber and filter

Huanhuan Li, Fangming Hu, Ying Tian, Panting Wang, Junjie Zhang, and Shiqing Xu
Opt. Express 27(10) 14437-14446 (2019)

Generation of wavelength-tunable soliton molecules in a 2-μm ultrafast all-fiber laser based on nonlinear polarization evolution

Pan Wang, Chengying Bao, Bo Fu, Xiaosheng Xiao, Philippe Grelu, and Changxi Yang
Opt. Lett. 41(10) 2254-2257 (2016)

Stretched graded-index multimode optical fiber as a saturable absorber for erbium-doped fiber laser mode locking

Zhaokun Wang, D. N. Wang, Fan Yang, Liujiang Li, Chun-Liu Zhao, Ben Xu, Shangzhong Jin, Shi-Ying Cao, and Zhan-Jun Fang
Opt. Lett. 43(9) 2078-2081 (2018)

All-normal-dispersion dissipative soliton fiber laser using an offset-splicing graded-index-multimode-fiber-based saturable absorber

Wei Pan, Liang Jin, Jiazhu Wang, Renyan Wang, He Zhang, Xu Yingtian, Xin Zhao, Yang Li, and Xiaohui Ma
Appl. Opt. 60(4) 923-928 (2021)