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Proceedings Paper

Highly sensitive refractive index sensor based on cladding mode interference in microtapered SMF
Author(s): Saurabh Mani Tripathi; Arun Kumar; Emmanuel Marin; Jean-Pierre Meunier
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Paper Abstract

A novel, highly sensitive refractive index sensor based on the modal interference in a microtapered telecom grade SMF is presented. The considered structure consists of a uniformly thinned region in between the tapered regions where the original core is virtually absent and the modes are supported by the cladding-ambient region index difference. The core mode evolution within the tapered region and its coupling to the cladding modes has been obtained using the localnormal- mode-matching. The proposed device has extremely high sensitivity ~ 2.6 μm/RIU for biological samples (nse ~ 1.33) and hence should be useful for precision bio/chemical sensing applications.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77535C (17 May 2011); doi: 10.1117/12.886094
Show Author Affiliations
Saurabh Mani Tripathi, Indian Institute of Technology (India)
Arun Kumar, Indian Institute of Technology (India)
Emmanuel Marin, Lab. Hubert Curien, CNRS, Univ. Lyon and Univ. Jean Monnet Saint-Etienne (France)
Jean-Pierre Meunier, Lab. Hubert Curien, CNRS, Univ. Lyon and Univ. Jean Monnet Saint-Etienne (France)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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