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Optical Engineering

Saturable absorber–based single-longitudinal mode tunable fiber laser using a Faraday rotator mirror as the rear cavity end
Author(s): Hsiang Wang; Hung-Wen Chiu; Shien-Kuei Liaw; Chin-Cheng Fan
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Paper Abstract

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.

Paper Details

Date Published: 11 November 2014
PDF: 4 pages
Opt. Eng. 53(11) 116108 doi: 10.1117/1.OE.53.11.116108
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Hsiang Wang, National Taiwan Univ. of Science and Technology (Taiwan)
Hung-Wen Chiu, Taipei Medical Univ. (Taiwan)
Shien-Kuei Liaw, National Taiwan Univ. of Science and Technology (Taiwan)
Chin-Cheng Fan, National Taiwan Univ. of Science and Technology (Taiwan)

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