Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing

Graham C. B. Lee; Chengbo Mou; Kaiming Zhou; Kate Sugden

doi:10.1117/12.2058315

2 June 2014 Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing

Graham C. B. Lee, Chengbo Mou, Kaiming Zhou, Kate Sugden

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915743 (2014) https://doi.org/10.1117/12.2058315
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In-fiber microchannels were fabricated directly in standard single mode fiber using the femtosecond laser inscribe and etch technique. This method of creating in-fiber microchannels offers great versatility since it allows complex three dimensional structures to be inscribed and then etched with hydrofluoric acid. Four in-fiber microchannel designs were experimentally investigated using this technique. Device characteristics were evaluated through monitoring the spectral change while inserting index matching oils into each microchannel - a R.I. sensitivity up to 1.55 dB/RIU was achieved. Furthermore, a simple Fabry-Pérot based refractometer with a R.I. sensitivity of 2.75 nm/RIU was also demonstrated.

Citation Download Citation

Graham C. B. Lee, Chengbo Mou, Kaiming Zhou, and Kate Sugden "Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915743 (2 June 2014); https://doi.org/10.1117/12.2058315

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