Multipoint refractive index sensor for liquids based on optical fiber Bragg-gratings

Harpreet K. Bal; Fotios Sidiroglou; Stephen F. Collins; Zourab Brodzeli

doi:10.1117/12.835546

5 October 2009 Multipoint refractive index sensor for liquids based on optical fiber Bragg-gratings

Harpreet K. Bal, Fotios Sidiroglou, Stephen F. Collins, Zourab Brodzeli

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75031U (2009) https://doi.org/10.1117/12.835546
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

A multipoint fiber optic refractive index sensor is presented, that is potentially capable of simultaneous measurement from many samples. The operation of this sensor is based on the reflection of light from a cleaved fiber end when the sensor is moved from one medium to another, while the sensor consists of two fiber couplers and an optical fiber Bragg grating (FBG). Experimental characterization of the sensor shows excellent agreement with numerical analysis and a precision of 0.002 and resolution of the order of 10-3. Through the use of multiple Bragg wavelengths measurement at multiple points is achieved.

Citation Download Citation

Harpreet K. Bal, Fotios Sidiroglou, Stephen F. Collins, and Zourab Brodzeli "Multipoint refractive index sensor for liquids based on optical fiber Bragg-gratings", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75031U (5 October 2009); https://doi.org/10.1117/12.835546

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