Chinese Optics Letters, Volume. 11, Issue 4, 041407(2013)

Short distributed feedback f iber laser with unidirectional output for sensing applications

Haifeng Qi, Zhiqiang Song, Gangding Peng, Shujuan Li, and Chang Wang

A short distributed feedback fiber laser with a nearly unidirectional output is fabricated and tested. The short fiber laser is made of a polarization-dependent phase-shift grating fabricated with a vertically polarized 244-nm ultraviolet (UV) laser. A single \pi phase-shift is introduced to a 2-cm grating at a specified position by directly moving the phase mask during UV beam scanning. Test results show that the laser has a single polarization longitudinal mode with 2.6-mW pump threshold. The backward-to- forward output power ratio is approximately 30:1. The relative intensity noise is –88 dB/Hz, and the linewidth is approximately 10 kHz at 75-mW 980-nm pumping. The unidirectional output and short dimension of this short fiber laser make it very useful in sensing applications, especially in multiplexed sensing applications.

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Haifeng Qi, Zhiqiang Song, Gangding Peng, Shujuan Li, Chang Wang. Short distributed feedback f iber laser with unidirectional output for sensing applications[J]. Chinese Optics Letters, 2013, 11(4): 041407

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Paper Information

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Received: Oct. 15, 2012

Accepted: Dec. 20, 2012

Published Online: Mar. 29, 2013

The Author Email:

DOI:10.3788/col201311.041407

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