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5 October 2009 Fibre laser using a microchannel based loss tuning element for refractive index sensing
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035D (2009) https://doi.org/10.1117/12.834749
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
Abstract
We have proposed and demonstrated a fibre laser system using a microchannel as a cavity loss tuning element for surrounding medium refractive index (SRI) sensing. A ~6μm width microchannel was created by femtosecond (fs) laser inscription assisted chemical etching in the cavity fibre, which offers a direct access to the external liquids. When the SRI changes, the microchannel behaves as a loss tuning element, hence modulating the laser cavity loss and output power. The results indicate that the presented laser sensing system has a linear response to the SRI with a sensitivity in the order of 10-5. Using higher pump power and more sensitive photodetector, the SRI sensitivity could be further enhanced.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chengbo Mou, Kaiming Zhou, Edward Davies, Lin Zhang, and Ian Bennion "Fibre laser using a microchannel based loss tuning element for refractive index sensing", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035D (5 October 2009); https://doi.org/10.1117/12.834749
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