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17 October 2012 Refractive index sensing measurement based on periodically tapered small core singlemode fibre
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84211S (2012) https://doi.org/10.1117/12.971211
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
An all-fibre refractive index sensor with a simple periodical tapers configuration is proposed and investigated experimentally. The proposed fibre refractive index sensor consists of a small core singlemode fibre with tapers periodically fabricated along the fibre using a focused CO2 laser beam, and sandwiched between two standard singlemode fibres. Such a structure can be used for sensing of refractive index by measuring the dip wavelength shift of the multimode interference within the small core fibre cladding. A minimum sensitivity of 125 nm/RIU is measured for a refractive index of 1.33 and a maximum sensitivity of 383 nm/RIU for a refractive index of 1.38. The proposed refractive index sensor benefits from simplicity and low-cost and achieves a competitive sensitivity compared with other fibre-optic sensors.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pengfei Wang, Gilberto Brambilla, Ming Ding, Lin Bo, Yuliya Semenova, Qiang Wu, and Gerald Farrell "Refractive index sensing measurement based on periodically tapered small core singlemode fibre", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211S (17 October 2012); https://doi.org/10.1117/12.971211
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