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Reflectivity variation in asymmetric random distributed feedback Raman fiber laser


Zainol Abidin, Nadiah and Abu Bakar, Muhammad Hafiz and Tamchek, Nizam and Mahamd Adikan, Faisal Rafiq and Mahdi, Mohd Adzir (2016) Reflectivity variation in asymmetric random distributed feedback Raman fiber laser. Laser Physics, 26 (1). art. no. 015105. ISSN 1054-660X; ESSN: 1555-6611


This paper demonstrates and discusses the effect of reflectivity on the intracavity power development and spectral profile of a 41.1 km asymmetric (half-opened cavity) random distributed feedback fiber laser with different pumping schemes. The laser cavity is confined by a fiber Bragg grating and the Rayleigh feedback amplified by Raman scattering effect that serves as virtual random distributed mirrors. The laser performance was observed by integrating a variety of power couplers while employing forward and backward pumping schemes. Forward pumping exhibits greater susceptibility to reflectivity variation compared to backward pumping. Meanwhile, higher reflectivity produced better threshold conditions but at the expense of lower saturation power. A power-saturated laser also manifested a broader spectrum than a laser conducted outside the saturation regime. These research findings will be beneficial in understanding the role of reflectivity and pumping configurations in enhancing asymmetric random distributed feedback fiber laser.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Science
DOI Number: https://doi.org/10.1088/1054-660X/26/1/015105
Publisher: IOP Publishing
Keywords: Fiber laser; Random laser; Rayleigh scattering
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 10 Nov 2017 04:47
Last Modified: 10 Nov 2017 04:47
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1088/1054-660X/26/1/015105
URI: http://psasir.upm.edu.my/id/eprint/27935
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