中国物理B ›› 2023, Vol. 32 ›› Issue (6): 64205-064205.doi: 10.1088/1674-1056/ac891f

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Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

H Ahmad1,2,3,†, B Nizamani1, M Z Samion1, N Yusoff1, and M F Ismail1   

  1. 1 Photonics Research Centre, Universiti Malaya, 50603 Kuala Lumpur, Malaysia;
    2 Physics Department, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia;
    3 Distinguished Visiting Professor, Universiti Kuala Lumpur British Malaysian Institute(UniKL BMI), Batu 8, Jln Sungai Pusu, 53100, Selangor, Malaysia
  • 收稿日期:2022-06-09 修回日期:2022-08-02 接受日期:2022-08-12 出版日期:2023-05-17 发布日期:2023-06-12
  • 通讯作者: H Ahmad E-mail:harith@um.edu.my
  • 基金资助:
    We would like to thank the Ministry of Higher Education, Malaysia for their support for this work through Grant, HiCoE (PRC-2022) and the Universiti Malaya for the funding of this work through Grant Nos. RU005-2021 and MGO23-2022.

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

H Ahmad1,2,3,†, B Nizamani1, M Z Samion1, N Yusoff1, and M F Ismail1   

  1. 1 Photonics Research Centre, Universiti Malaya, 50603 Kuala Lumpur, Malaysia;
    2 Physics Department, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia;
    3 Distinguished Visiting Professor, Universiti Kuala Lumpur British Malaysian Institute(UniKL BMI), Batu 8, Jln Sungai Pusu, 53100, Selangor, Malaysia
  • Received:2022-06-09 Revised:2022-08-02 Accepted:2022-08-12 Online:2023-05-17 Published:2023-06-12
  • Contact: H Ahmad E-mail:harith@um.edu.my
  • Supported by:
    We would like to thank the Ministry of Higher Education, Malaysia for their support for this work through Grant, HiCoE (PRC-2022) and the Universiti Malaya for the funding of this work through Grant Nos. RU005-2021 and MGO23-2022.

摘要: We demonstrate antimonene as a saturable absorber (SA) to generate an ultrafast mode-locked and Q-switched laser in the 2 μm wavelength region. The two antimonene-based SAs were prepared and inserted separately in a thulium-holmium-doped fiber laser to produce the pulsed laser. Antimonene was coated onto a tapered fiber to generate soliton mode-locked pulses and used in thin-film form for the generation of Q-switched pulses. The mode-locking was stable within a pump power of 267 mW-511 mW, and the laser operated at a central wavelength of 1897.4 nm. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 MHz, with a signal-to-noise ratio of 64 dB. Q-switched laser operation was stable at a wavelength of 1890.1 nm within a pump power of 312 mW-381 mW. With the increase in pump power from 312 mW to 381 mW, the repetition rate increased to a maximum of 56.63 kHz and the pulse width decreased to a minimum value of 2.85 μs. Wide-range tunability of the Q-switched laser was also realized within the wavelength range of 1882 nm-1936 nm.

关键词: mode-locking, Q-switched fiber laser, optical saturable absorber

Abstract: We demonstrate antimonene as a saturable absorber (SA) to generate an ultrafast mode-locked and Q-switched laser in the 2 μm wavelength region. The two antimonene-based SAs were prepared and inserted separately in a thulium-holmium-doped fiber laser to produce the pulsed laser. Antimonene was coated onto a tapered fiber to generate soliton mode-locked pulses and used in thin-film form for the generation of Q-switched pulses. The mode-locking was stable within a pump power of 267 mW-511 mW, and the laser operated at a central wavelength of 1897.4 nm. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 MHz, with a signal-to-noise ratio of 64 dB. Q-switched laser operation was stable at a wavelength of 1890.1 nm within a pump power of 312 mW-381 mW. With the increase in pump power from 312 mW to 381 mW, the repetition rate increased to a maximum of 56.63 kHz and the pulse width decreased to a minimum value of 2.85 μs. Wide-range tunability of the Q-switched laser was also realized within the wavelength range of 1882 nm-1936 nm.

Key words: mode-locking, Q-switched fiber laser, optical saturable absorber

中图分类号:  (Modulation, tuning, and mode locking)

  • 42.60.Fc
42.60.Gd (Q-switching) 42.55.Wd (Fiber lasers) 42.70.-a (Optical materials)