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Proceedings Paper

External feedback DFB fibre laser sensors in the weak reflection regime
Author(s): Scott Foster
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Paper Abstract

An analysis of the effect of weak feedback on Bragg grating fibre laser output parameters is presented and a simple sensor arrangement based on monitoring intensity fluctuations of a DFB fibre laser with a weak external reflector is considered. Calculations suggest that it may be possible, under certain conditions, to resolve changes to the length of the external cavity at close to the thermal noise limit. This introduces the possibility of achieving strain resolution in the sub-picostrain regime in the low frequency domain where resolution of conventional fibre laser sensors is limited by 1/f noise.

Paper Details

Date Published: 30 January 2012
PDF: 7 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83512Z (30 January 2012); doi: 10.1117/12.916036
Show Author Affiliations
Scott Foster, Defence Science and Technology Organisation (Australia)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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