External feedback DFB fibre laser sensors in the weak reflection regime

Scott Foster

doi:10.1117/12.916036

30 January 2012 External feedback DFB fibre laser sensors in the weak reflection regime

Scott Foster

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 83512Z (2012) https://doi.org/10.1117/12.916036
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia

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.

Citation Download Citation

Scott Foster "External feedback DFB fibre laser sensors in the weak reflection regime", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83512Z (30 January 2012); https://doi.org/10.1117/12.916036

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