5 December 2017 Noise-like pulse generation in an ytterbium-doped fiber laser using tungsten disulphide
Author Affiliations +
Abstract
We demonstrated the noise-like pulse (NLP) generation in an ytterbium-doped fiber (YDF) laser with tungsten disulphide ( WS 2 ). Stable fundamental mode locking and second-order harmonic mode locking were observed. The saturable absorber (SA) was a WS 2 -polyvinyl alcohol film. The modulation depth of the WS 2 film was 2.4%, and the saturable optical intensity was 155    MW cm 2 . Based on this SA, the fundamental NLP with a pulse width of 20 ns and repetition rate of 7 MHz were observed. The autocorrelation trace of output pulses had a coherent spike, which came from NLP. The average pulse width of the spike was 550 fs on the top of a broad pedestal. The second-order harmonic NLP had a spectral bandwidth of 1.3 nm and pulse width of 10 ns. With the pump power of 400 mW, the maximum output power was 22.2 mW. To the best of our knowledge, this is the first time a noise-like mode locking in an YDF laser based on WS 2 -SA in an all normal dispersion regime was obtained.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Wenping Zhang, Wenping Zhang, Yanrong Song, Yanrong Song, Heyang Guoyu, Heyang Guoyu, Runqin Xu, Runqin Xu, Zikai Dong, Zikai Dong, Kexuan Li, Kexuan Li, Jinrong Tian, Jinrong Tian, Shuang Gong, Shuang Gong, } "Noise-like pulse generation in an ytterbium-doped fiber laser using tungsten disulphide," Optical Engineering 56(12), 126101 (5 December 2017). https://doi.org/10.1117/1.OE.56.12.126101 . Submission: Received: 28 September 2017; Accepted: 14 November 2017
Received: 28 September 2017; Accepted: 14 November 2017; Published: 5 December 2017
JOURNAL ARTICLE
6 PAGES


SHARE
RELATED CONTENT


Back to Top