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

作　　者：H Ahmad B Nizamani M Z Samion N Yusoff M F Ismail 

机构地区：[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

出　　处：《Chinese Physics B》2023年第6期259-269,共11页中国物理B（英文版）

基　　金：support for this work through Grant, HiCoE (PRC-2022);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–holmiumdoped 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 m W–511 m W, 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 d B. Q-switched laser operation was stable at a wavelength of 1890.1 nm within a pump power of 312 m W–381 m W. With the increase in pump power from 312 m W to 381 m W, the repetition rate increased to a maximum of 56.63 k Hz 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 of1882 nm–1936 nm.

关 键 词：MODE-LOCKING Q-switched fiber laser optical saturable absorber 

分 类 号：TN248[电子电信—物理电子学]