Mode-locked ytterbium-doped fiber laser based on tungsten disulphide. (18th November 2015)

• Record Type: Journal Article
• Authors: Guoyu, Heyang; Song, Yanrong; Li, Kexuan; Dou, Zhiyuan; Tian, Jinrong; Zhang, Xinping
• Is Part Of: Laser physics letters. Volume 12:Number 12(2015:Dec.)
• Publication Date: 2015-11-18
• Subjects: fiber lasers -- nonlinear optical materials -- mode locking; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-2011/12/12/125102
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We demonstrated an all-normal-dispersion Yb-doped mode-locked fiber laser based on tungsten disulphide (WS2 ). The saturable absorbers (SA) were made by mixing WS2 solution with polyvinyl alcohol (PVA), and then evaporated on a substrate. The modulation depth of the WS2 film was 2.06% and the saturable optical intensity was 71.6 MW cm −2 . When the WS2 film was inserted into the fiber laser, the mode-locked pulses with pulse width of 2.5 ns and repetition rate of 2.84 MHz were obtained. As the pump power increased to 350 mW, the maximum output power was measured to be 8.02 mW. To the best of our knowledge, this is the first time to realize mode-locked pulses based on WS2 -SA at 1 μ m waveband.