A photonic crystal fibre tip refractometer based on multimode interference

Pengfei Wang; Ming Ding; Lin Bo; Yuliya Semenova; Gilberto Brambilla; Gerald Farrell

doi:10.1117/12.2059596

2 June 2014 A photonic crystal fibre tip refractometer based on multimode interference

Pengfei Wang, Ming Ding, Lin Bo, Yuliya Semenova, Gilberto Brambilla, Gerald Farrell

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91578F (2014) https://doi.org/10.1117/12.2059596
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A compact singlemode-photonic crystal fibre-singlemode fibre tip (SPST) refractive index sensor is demonstrated in this paper. A CO2 laser cleaving is exploited to provide a clean-cut fibre tip which is then coated by a layer of gold to increase reflection. An average sensitivity of 39.1 nm/RIU and a resolvable index change of 2.56×10-4 are obtained experimentally with a ~3.2 µm diameter SPST. Because of its compactness, ease of fabrication, linear response, high sensitivity, easy connectivity to other fibreized optical components and low cost, this refractometer could find various applications in chemical and biological sensing.

Citation Download Citation

Pengfei Wang, Ming Ding, Lin Bo, Yuliya Semenova, Gilberto Brambilla, and Gerald Farrell "A photonic crystal fibre tip refractometer based on multimode interference", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91578F (2 June 2014); https://doi.org/10.1117/12.2059596

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