Noise-like pulse generation in an ytterbium-doped fiber laser using tungsten disulphide

Wenping Zhang; Yanrong Song; Heyang Guoyu; Runqin Xu; Zikai Dong; Kexuan Li; Jinrong Tian; Shuang Gong

doi:10.1117/1.OE.56.12.126101

5 December 2017 Noise-like pulse generation in an ytterbium-doped fiber laser using tungsten disulphide

Wenping Zhang, Yanrong Song, Heyang Guoyu, Runqin Xu, Zikai Dong, Kexuan Li, Jinrong Tian, Shuang Gong

Author Affiliations +

Optical Engineering, Vol. 56, Issue 12, 126101 (December 2017). https://doi.org/10.1117/1.OE.56.12.126101

Abstract

We demonstrated the noise-like pulse (NLP) generation in an ytterbium-doped fiber (YDF) laser with tungsten disulphide ( WS2). Stable fundamental mode locking and second-order harmonic mode locking were observed. The saturable absorber (SA) was a WS2-polyvinyl alcohol film. The modulation depth of the WS2 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 WS2-SA in an all normal dispersion regime was obtained.

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Wenping Zhang, Yanrong Song, Heyang Guoyu, Runqin Xu, Zikai Dong, Kexuan Li, Jinrong Tian, and 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

Received: 28 September 2017; Accepted: 14 November 2017; Published: 5 December 2017

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