Mode-locked thulium–bismuth codoped fiber laser using graphene saturable absorber in ring cavity

Zen, D.I.M. and Saidin, N. and Damanhuri, S.S.A. and Harun, Sulaiman Wadi and Ahmad, Harith and Ismail, M.A. and Dimyati, K. and Halder, A. and Paul, Mukul Chandra and Das, S. and Pal, M. and Bhadra, S.K. (2013) Mode-locked thulium–bismuth codoped fiber laser using graphene saturable absorber in ring cavity. Applied Optics, 52 (6). pp. 1226-1229. ISSN 0003-6935

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Abstract

We demonstrate mode locking of a thulium–bismuth codoped fiber laser (TBFL) operating at 1901.6 nm, using a graphene-based saturable absorber (SA). In this work, a single layer graphene is mechanically exfoliated using the scotch tape method and directly transferred onto the surface of a fiber pigtail to fabricate the SA. The obtained Raman spectrum characteristic indicates that the graphene on the core surface has a single layer. At 1552 nm pump power of 869 mW, the mode-locked TBFL self starts to generate an optical pulse train with a repetition rate of 16.7 MHz and pulse width of 0.37 ps. This is a simple, low-cost, stable, and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.

Item Type: Article
Uncontrolled Keywords: Mode-locked; Thulium–bismuth codoped fiber laser; Graphene saturable absorber; Ring cavity
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Oct 2015 06:29
Last Modified: 09 Oct 2018 06:09
URI: http://eprints.um.edu.my/id/eprint/14338

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