Microfiber sagnac interferometer for sensing applications

Microfiber sagnac interferometer for sensing applications

In this paper we propose an optical fiber-based refractive index and temperature sensor using an MNF (micro/nano fiber) inserted in a Sagnac loop interferometer [1]. A portion of the PMF is tapered into a micro/nano dimension to increase the interactions between a guided signal and the surrounding e...

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Bibliographic Details
Main Authors: Kuczkowski, Michal, Ying, Cui, Quyen Dinh, Xuan, Shum, Perry Ping, Rutkowska, Katarzyna A., Wolinski, Tomasz R.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Online Access:https://hdl.handle.net/10356/105540
http://hdl.handle.net/10220/17705
http://dx.doi.org/10.4302/plp.2012.4.05
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Institution: Nanyang Technological University
Language: English
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Summary:In this paper we propose an optical fiber-based refractive index and temperature sensor using an MNF (micro/nano fiber) inserted in a Sagnac loop interferometer [1]. A portion of the PMF is tapered into a micro/nano dimension to increase the interactions between a guided signal and the surrounding environment. Experimental tests have demonstrated low response to temperature and high sensitivity to refractive index change of a liquid surrounding the MNF. It has been shown that the sensitivity of the setup under test to temperature decreases when a longer MNF is used. The maximum sensitivity for a refractive index achieved equals to 1068nm/RIU, which was obtained by a 4.7-mm long MNF with a diameter of 30um.

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