Saturable absorber-based single-longitudinal mode tunable fiber laser using a Faraday rotator mirror as the rear cavity end

A single-longitudinal mode selection is realized in a linear-cavity tunable fiber laser constructed using a Faraday rotator mirror and a partial reflectance fiber Bragg grating as the cavity ends. At both tuning wavelengths of 1543.47 and 1557.52 nm, the measured optical signal-to-noise ratio is lar...

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Bibliographic Details
Published in:Optical engineering 2014-11, Vol.53 (11), p.116108-116108
Main Authors: Wang, Hsiang, Chiu, Hung-Wen, Liaw, Shien-Kuei, Fan, Chin-Cheng
Format: Article
Language:English
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Summary:A single-longitudinal mode selection is realized in a linear-cavity tunable fiber laser constructed using a Faraday rotator mirror and a partial reflectance fiber Bragg grating as the cavity ends. At both tuning wavelengths of 1543.47 and 1557.52 nm, the measured optical signal-to-noise ratio is larger than 40 dB and a linewidth less than 1 MHz is obtained. It is based on the usage of a piece of gain fiber type saturable absorber as the mode filter. The pumping power efficiency is improved by 10% by recycling the residual pump power to the gain medium.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.53.11.116108