Tunable S-band passively Q-switched thulium-doped fluoride fiber laser using Iron Phosphorus Trichalcogenide-PVA (FePS3-PVA) film
Document Type
Article
Publication Date
7-1-2023
Abstract
This work shows the generation of Q-switched pulses in a thulium-doped fluoride fiber (TDFF) using a FePS3 saturable absorber (SA). The modulation depth of the FePS3 SA was 34.5%, with a saturation intensity of 0.551 kW cm(-2). The Q-switched laser began at 70 mW pump power, sustained to 166 mW, having an operating wavelength of 1502 nm. Adjusting the pump power between that range allows for altering the repetition rate between 19.7 and 29.8 kHz. At 166 mW value of pump power, the laser showed a high signal-to-noise ratio similar to 46 dB and was sustained over an hour with similar results obtained over 8 h. Tunability was achieved from 1450 nm to 1516 nm when a tunable bandpass filter was added. The reported FePS3 SA-based TDFF Q-switched laser can be utilized in the S-band region for photonics applications.
Keywords
thulium-doped fluoride fiber laser, saturable absorber, iron phosphate trisulfide, Q-switched pulses
Divisions
PHYSICS,photonics
Funders
Ministry of Education, Malaysia,Universiti Malaya (RU005-2021) ; (RK021-2019)
Publication Title
Laser Physics
Volume
33
Issue
7
Publisher
IOP Publishing
Publisher Location
TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND