Q-switched fiber laser with a hafnium-bismuth-erbium codoped fiber as gain medium and Sb2Te3 as saturable absorber
Document Type
Article
Publication Date
5-1-2022
Abstract
We successfully demonstrate Q-switched fiber laser with a 20 cm long Hafnium-Bismuth-Erbium codoped fiber (HBEDF) as an active medium in conjunction with Antimony Telluride (Sb2Te3) saturable absorber (SA). The HBEDF has an Erbium ion absorption coefficient of 100 dB/m at 980 nm; thus, the laser setup only requires a very short length of gain medium for lasing in the 1550 nm range. We realize the Sb2Te3 SA obtained by embedding the material into Polyvinyl Alcohol (PVA), and a Q-switched pulse train operating at 1560.7 nm is realized, using only a 20 cm long active fiber, when the prepared Sb2Te3 thin film is integrated into the laser ring cavity. The repetition rate of the Q-switched pulses is tunable from 47.7 to 74.8 kHz as the pump power is raised from the threshold value equal to 69.9 mW to a value of 105.0 mW. The maximum attainable pulse energy is 31.2 nJ. Our results indicate that the Sb2Te3 material is useful as an effective Q-switcher especially for the laser operation in 1.55 mu m range.
Keywords
Sb2Te3, Q-switching, Hafnium-Bismuth-Erbium codoped fiber
Divisions
sch_ecs
Funders
SATU joint research scheme through the University of Malaya [Grant No: ST036-2020],Airlangga University [Grant No: 1127/UN3.14/PT/2020]
Publication Title
Journal of Russian Laser Research
Volume
43
Issue
3
Publisher
Springer
Publisher Location
ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES