Optical fibre cavity ring down measurement of refractive index with a microchannel drilled by femtosecond laser

Kaiming Zhou; David Webb; Chengbo Mou; Mark Farries; Neil Hayes; Ian Bennion

doi:10.1117/12.835167

5 October 2009 Optical fibre cavity ring down measurement of refractive index with a microchannel drilled by femtosecond laser

Kaiming Zhou, David Webb, Chengbo Mou, Mark Farries, Neil Hayes, Ian Bennion

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035Y (2009) https://doi.org/10.1117/12.835167
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

μA microchannel was inscribed in the fibre of a ring cavity which was constructed from two 0.1%:99.9% couplers and a 10m fibre loop. Cavity ring down spectroscopy (CRDS) was used to measure the refractive index (RI) of gels infused into the microchannel with high resolution. The ring down time discloses a nonlinear increase with respect to the RI of the gel and sensitivity up to 300μs/RI unit (RIU) and resolution of 5×10^-4 were obtained.

Citation Download Citation

Kaiming Zhou, David Webb, Chengbo Mou, Mark Farries, Neil Hayes, and Ian Bennion "Optical fibre cavity ring down measurement of refractive index with a microchannel drilled by femtosecond laser", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035Y (5 October 2009); https://doi.org/10.1117/12.835167

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