S+/S band passively Q-switched thulium-fluoride fiber laser based on using gallium selenide saturable absorber
Document Type
Article
Publication Date
1-1-2018
Abstract
A Q-switched thulium-fluoride fiber (TFF) laser using gallium selenide (GaSe) as a passive saturable absorber (SA) for operation in the S+/S band is demonstrated. The generated pulses can be tuned from 1454 nm to 1512 nm, giving a tuning range of 58 nm. At 1502 nm, stable Q-switching operation is obtained from a pump power of 76.2 mW and is observed until the maximum pump power of 133.6 mW is reached, with the repetition rate varying from 16.5 kHz to 33.3 kHz and having a narrowest pulse width at 2.7 µs. The highest pulse energy obtained in this work is 51.4 nJ and this is, to the knowledge of the authors, the first time that Q-switching operation in the S+/S band region is obtained from a TFF laser using a GaSe based SA.
Keywords
Thulium-fluoride fiber laser, Q-switched, S band fiber laser, Saturable absorber, Gallium selenide
Divisions
photonics
Funders
Ministry of Higher Education (MOHE) under the grants LRGS (2015)/NGOD/UM/KPT,University of Malaya under the grants RU 001 – 20017 and RP 029B – 15AFR
Publication Title
Optics & Laser Technology
Volume
107
Publisher
Elsevier