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Stable single-mode operation of a narrow-linewidth, linear polarization erbium fibre ring laser using a saturable absorber

Meng, Z. and Stewart, G. and Whitenett, G.L. (2006) Stable single-mode operation of a narrow-linewidth, linear polarization erbium fibre ring laser using a saturable absorber. Journal of Lightwave Technology, 24 (5). pp. 2179-2183. ISSN 0733-8724

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Abstract

This paper describes the design and operation of a stable narrow-linewidth linearly polarized fiber ring laser using a polarization-maintaining (PM) erbium-doped fiber as a saturable absorber. The effect of the PM fiber on suppressing mode hopping is experimentally demonstrated and optimum conditions for single-mode operation are identified. Laser output power is ∼ 4.7 mW at 1535 nm for a pump power of 94 mW, the polarization extinction ratio is 24.8 dB, the SNR is larger than 45 dB, the relative intensity noise is below −104 dB/Hz at frequencies above 150 kHz, and the linewidth is less than 1.5 kHz. Potential applications of the fiber laser for interferometric or spectroscopic fiber sensors are briefly discussed.