Temperature-Insensitive Miniaturized Fiber Inline Fabry-Perot Interferometer for Highly Sensitive Refractive Index Measurement

Abstract

We report a miniaturized fiber inline Fabry-Perot interferometer (FPI), with an open micro-notch cavity fabricated by one-step fs laser micromachining, for highly sensitive refractive index measurement. The device was tested for measurement of the refractive indices of various liquids including isopropanol, acetone and methanol at room temperature, as well as the temperature-dependent refractive index of deionized water from 3 to 90°C. The sensitivity for measurement of refractive index change of water was 1163 nm/RIU at the wavelength of 1550 nm. The temperature cross-sensitivity of the device was about 1.1x10-6 RIU/°C. The small size, all-fiber structure, small temperature dependence, linear response and high sensitivity, make the device attractive for chemical and biological sensing.

Department(s)

Mechanical and Aerospace Engineering

Second Department

Electrical and Computer Engineering

Sponsor(s)

United States. Office of Naval Research
University of Missouri Research Board

Keywords and Phrases

Fabry-Perot; Fiber Optics Components; Fiber Optics Sensors

International Standard Serial Number (ISSN)

1094-4087

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 Optical Society of America, All rights reserved.

Publication Date

01 Apr 2008

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