High-sensitivity Mach-Zehnder interferometric refractive index sensor based on two different ultra-abrupt tapers

Xiufeng Shen; Le Xu; Sumei Wang

doi:10.1117/12.2074872

19 February 2015 High-sensitivity Mach-Zehnder interferometric refractive index sensor based on two different ultra-abrupt tapers

Xiufeng Shen, Le Xu, Sumei Wang

Author Affiliations +

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 94491X (2015) https://doi.org/10.1117/12.2074872
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

A high-sensitivity Mach-Zehnder(MZ) interferometric refractive index(RI) sensor based on two different ultra-abrupt tapers is proposed and demonstrated experimentally. The whole fabrication process is relatively simple. One taper is fabricated by the fusion-splicing method and the ratio of the waist diameter to the taper length is 1:1. The other taper is fabricated by CO2 laser irradiation with a ratio around 1:10. According to the experimental results, the spectral loss of the proposed MZ interferometric sensor has a linear response to the external RI change with a ultrahigh sensitivity of -412.02138 dB/RIU(refractive index unit) in the range of 1.3505-1.3684. The sensor has the potential application for RI measurement in chemical or biochemical sensing fields due to its low cost, simple structure and extremely high sensitivity.

Citation Download Citation

Xiufeng Shen, Le Xu, and Sumei Wang "High-sensitivity Mach-Zehnder interferometric refractive index sensor based on two different ultra-abrupt tapers", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 94491X (19 February 2015); https://doi.org/10.1117/12.2074872

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available