Zakaria, Umi Namirah and Paul, Mukul Chandra and Das, Shyamal and Dhar, Anirban and Zulkipli, Nur Farhanah and Rosol, Ahmad Haziq Aiman and Yasin, Moh and Harun, Sulaiman Wadi (2022) Q-Switched Fiber Laser with a Hafnium-Bismuth-Erbium Codoped Fiber as Gain Medium and Sb2Te3 as Saturable Absorber. Journal of Russian Laser Research, 43 (3). pp. 339-345. ISSN 1071-2836

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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.

Item Type:	Article
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	21 Sep 2023 09:06
Last Modified:	21 Sep 2023 09:06
URI:	http://cgcri.csircentral.net/id/eprint/5537

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