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  • Received: Oct. 11, 2019

    Accepted: Jan. 5, 2020

    Posted: Jan. 6, 2020

    Published Online: Mar. 20, 2020

    The Author Email: Yuen Hong Tsang (Yuen.Tsang@polyu.edu.hk)

    DOI: 10.1364/PRJ.380146

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    Ping Kwong Cheng, Chun Yin Tang, Xin Yu Wang, Long-Hui Zeng, Yuen Hong Tsang. Passively Q-switched and femtosecond mode-locked erbium-doped fiber laser based on a 2D palladium disulfide (PdS2) saturable absorber[J]. Photonics Research, 2020, 8(4): 04000511

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Photonics Research, Vol. 8, Issue 4, 04000511 (2020)

Passively Q-switched and femtosecond mode-locked erbium-doped fiber laser based on a 2D palladium disulfide (PdS2) saturable absorber

Ping Kwong Cheng1,†, Chun Yin Tang1,†, Xin Yu Wang, Long-Hui Zeng, and Yuen Hong Tsang*

Author Affiliations

  • Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

Abstract

Stable Q-switched and mode-locked erbium-doped fiber lasers (EDFLs) are first demonstrated by using the novel layered palladium disulfide (PdS2), a new member of group 10 transition metal dichalcogenides (TMDs)-based saturable absorbers (SAs). Self-started Q-switched operation at 1567 nm was achieved with a threshold pump power of 50.6 mW. The modulation ranges of pulse duration and repetition rate were characterized as 12.6–4.5 μs and 17.2–26.0 kHz, respectively. Meanwhile, a mode-locked EDFL was also obtained with a pump power threshold of 106.4 mW. The achieved pulse duration is 803 fs, corresponding to a center wavelength of 1565.8 nm and 4.48 nm 3 dB bandwidth. To the best of our knowledge, the achieved pulse duration of the mode-locked EDFL in this work is the narrowest compared with all other group 10 TMD SA-based lasers.

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