Multi-color Q-switched of neodymium-doped all-fiber laser based on tungsten disulfide saturable absorber

• Published in: Journal of materials science. Materials in electronics Vol. 33; no. 27; pp. 21569 - 21575
• Main Authors: Rong, Xiaofeng, Yang, Yumin, Liu, Xuefei, Xiao, Wenjun, Yang, Cheng, Wang, Zhen, Liu, Zhaohui, Xiao, Yuanni, Wang, Degui, Xu, Huiying, Cai, Zhiping
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2022; Springer Nature B.V
• Subjects: Absorbers; Characterization and Evaluation of Materials; Chemistry and Materials Science; Color; Fiber lasers; Laser applications; Lasers; Materials Science; Multilayers; Neodymium; Optical and Electronic Materials; Pulse duration; Q switched lasers; Signal to noise ratio; Silicon dioxide; Tantalum; Tantalum oxides; Transition metal compounds; Tungsten disulfide
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08946-8

In this paper, a Q-switched and three-color operation of Neodymium-doped silica all-fiber laser is realized, in which, a few-layer transition metal dichalcogenides WS 2 is pioneered to be used as a saturable absorber (SA). The compact and simple linear cavity contains homemade fiber mirrors by directly depositing a multilayer coating the SiO 2 /Ta 2 O 5 dielectric films on fiber end-face. In particular, by inserting the WS 2 -SA into the FP laser cavity, it is found that a stable Q-switching operation was achieved with the higher signal-to-noise ratios (SNR) of 60.76 dB, and the shortest pulse duration of 990 ns, as well as the maximum repetition rate of 124.4 kHz. Meanwhile, the maximum average output power and maximum pulse energy are close to 8.9 mW and 71.5 nJ, respectively. This is, the first demonstration of compact WS 2 -based neodymium-doped all-fiber laser operation at 1081.9, 1091.3 and 1100.1 nm.