Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region
Document Type
Article
Publication Date
6-1-2023
Abstract
We demonstrate antimonene as a saturable absorber (SA) to generate an ultrafast mode-locked and Q-switched laser in the 2 mu m 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 mu s. Wide-range tunability of the Q-switched laser was also realized within the wavelength range of 1882 nm-1936 nm.
Keywords
Mode-locking, Q-switched fiber laser, Optical saturable absorber
Divisions
PHYSICS,photonics
Funders
Ministry of Higher Education, Malaysia [Grant no. PRC-2022],Universiti Malaya [Grant no. MGO23-2022, RU005-2021]
Publication Title
Chinese Physics B
Volume
32
Issue
6
Publisher
IOP Publishing
Publisher Location
TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND