Controlling the sensitivity of a non-adiabatic tapered optical fiber for measuring the refractive index using all fiber Sagnac loop interferometer

M. I. Zibaii; P. A. S. Jorge; O. Frazão; H. Latifi

doi:10.1117/12.892102

26 July 2011 Controlling the sensitivity of a non-adiabatic tapered optical fiber for measuring the refractive index using all fiber Sagnac loop interferometer

M. I. Zibaii, P. A. S. Jorge, O. Frazão, H. Latifi

Author Affiliations +

Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 800144 (2011) https://doi.org/10.1117/12.892102
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal

Abstract

A single-mode non-adiabatic tapered optical fiber (NATOF) sensor was inserted into a Sagnac loop interferometer allowing tuning its sensitivity to refractive index (RI) by use of polarization control. By adjusting any polarization controllers inserted in the Sagnac loop interferometer, various cladding modes are selectively excited in each arm of the interferometric taper resulting into different phase changes for the clockwise and counterclockwise beams. By this method, sensitivity of the sensor for RI in the range from 1.3380 to 1.3510 was tuned between 876.24 RIU/nm to 1233.07 RIU/nm.

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M. I. Zibaii, P. A. S. Jorge, O. Frazão, and H. Latifi "Controlling the sensitivity of a non-adiabatic tapered optical fiber for measuring the refractive index using all fiber Sagnac loop interferometer", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 800144 (26 July 2011); https://doi.org/10.1117/12.892102

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