Noise-like pulses with an h-shape from a 2 μm semiconductor saturable-absorber mirror mode-locked fiber oscillator. (22nd September 2020)

• Record Type: Journal Article
• Authors: Wang, JingRu; Cao, Xue; Xian, AnHua; Chen, Xiang; Wu, QianQian; Liu, YangYu; Ge, ZhiXiang; Zhou, Wei; Wang, HaoTian; Huang, HaiTao; Wang, YiShan; Li, Wei; Matcher, Stephen J; Tang, DingYuan; Shen, DeYuan
• Is Part Of: Laser physics letters. Volume 17:Number 11(2020:Nov.)
• Publication Date: 2020-09-22
• Subjects: mode-locked -- h-shaped pulse -- noise-like pulse; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/abb1bc
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We report on a novel type of h-shaped pulse with femtosecond substructures from a linear-cavity semiconductor saturable-absorber mirror mode-locked thulium-doped fiber laser. It yields a stable nanosecond h-shaped pulse-train with a pulse envelope width ranging from 880 ps to 1.41 ns with a typical substructure pulse duration around 440 fs. The obtained h-shaped pulse is a noise-like pulse with strong robustness to pump power changes and environmental perturbation. It can also operate in the harmonic mode-locking regime. The scheme makes the structure compact and stable, and can obtain a MHz repetition rate, which is advantageous for real-life applications