Phase sensitive signal analysis for bi-tapered optical fibers

Amit Ben Harush Negari; Daniel Jauregui; Juan M. Sierra Hernandez; Diego Garcia Mina; Branden J. King; Ighodalo Idehenre; Peter E. Powers; Karolyn M. Hansen; Joseph W. Haus

doi:10.1117/12.2208934

9 March 2016 Phase sensitive signal analysis for bi-tapered optical fibers

Amit Ben Harush Negari, Daniel Jauregui, Juan M. Sierra Hernandez, Diego Garcia Mina, Branden J. King, Ighodalo Idehenre, Peter E. Powers, Karolyn M. Hansen, Joseph W. Haus

Author Affiliations +

Proceedings Volume 9719, Biophysics, Biology, and Biophotonics: the Crossroads; 971907 (2016) https://doi.org/10.1117/12.2208934
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

Our study examines the transmission characteristics of bi-tapered optical fibers, i.e. fibers that have a tapered down and up span with a waist length separating them. The applications to aqueous and vapor phase biomolecular sensing demand high sensitivity. A bi-tapered optical fiber platform is suited for label-free biomolecular detection and can be optimized by modification of the length, diameter and surface properties of the tapered region. We have developed a phase sensitive method based on interference of two or more modes of the fiber and we demonstrate that our fiber sensitivity is of order 10^-4 refractive index units. Higher sensitivity can be achieved, as needed, by enhancing the fiber design characteristics.

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Amit Ben Harush Negari, Daniel Jauregui, Juan M. Sierra Hernandez, Diego Garcia Mina, Branden J. King, Ighodalo Idehenre, Peter E. Powers, Karolyn M. Hansen, and Joseph W. Haus "Phase sensitive signal analysis for bi-tapered optical fibers", Proc. SPIE 9719, Biophysics, Biology, and Biophotonics: the Crossroads, 971907 (9 March 2016); https://doi.org/10.1117/12.2208934

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