Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6888341 | Optical Fiber Technology | 2018 | 6 Pages |
Abstract
We have designed an all-fiber passive mode-locking thulium-doped fiber laser that uses molybdenum disulfide (MoS2) as a saturable absorber (SA) material. A free-standing few-layer MoS2-polyvinyl alcohol (PVA) film is fabricated by liquid phase exfoliation (LPE) and is then transferred onto the end face of a fiber connector. The excellent saturable absorption of the fabricated MoS2-based SA allows the laser to output soliton pulses at a pump power of 500â¯mW. Fundamental frequency mode-locking is realized at a repetition frequency of 13.9â¯MHz. The central wavelength is 1926â¯nm, the 3â¯dB spectral bandwidth is 2.86â¯nm and the pulse duration is 1.51â¯ps. Additionally, third-order harmonic mode-locking of the laser is also achieved. The pulse duration is 1.33â¯ps, which is slightly narrower than the fundamental frequency mode-locking bandwidth. The experimental results demonstrate that the few-layer MoS2-PVA SA is promising for use in 2â¯Î¼m laser systems.
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Authors
Liming Cao, Xing Li, Rui Zhang, Duanduan Wu, Shixun Dai, Jian Peng, Jian Weng, Qiuhua Nie,