Bismuth (III) Telluride-Polyethylene Oxide as passive saturable absorber. (January 2019)

• Record Type: Journal Article
• Authors: Muhamad Apandi, N H; Zuikafly, S N; Ahmad, F; Yasin, M; Harun, S W
• Is Part Of: Journal of physics. Volume 1151(2019)
• Publication Date: 2019-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1151/1/012002
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: In this paper, we investigate the generation of 1.55 µm Q-switched fiber laser with incorporating of Bismuth Telluride (Bi2 Te3 ) embedded in Polythylene Oxide (PEO) as a saturable absorber (SA). The Bi2 Te3 /PEO SAs was prepared by mixing the Bi2 Te3 powder into PEO solution under ultrasonication. Then, Bi2 Te3 -PEO suspension was poured into a petri dish and left dry to develop free standing SA. The Q-switched laser operates at a central wavelength of 1531.6 nm with 3 dB bandwidth of 0.4 nm. By increasing the pump power, the repetition rate increased from 22.79 kHz to 65.27 kHz and with the decreased of pulse width from 18.12 µs to 7.12 µs. The signal to noise ratio at maximum pump power is estimated 68.2 dB, indicating that this SA can produce a highly stable Q-switched pulsed laser.