Fiber-optic temperature sensor interrogation technique based on an optoelectronic oscillator

Hao Chen; Shiwei Zhang; Hongyan Fu; Hanqing Li; Dan Zhang; Nan Chen

doi:10.1117/1.OE.55.3.031107

6 October 2015 Fiber-optic temperature sensor interrogation technique based on an optoelectronic oscillator

Hao Chen, Shiwei Zhang, Hongyan Fu, Hanqing Li, Dan Zhang, Nan Chen

Author Affiliations +

Optical Engineering, Vol. 55, Issue 3, 031107 (October 2015). https://doi.org/10.1117/1.OE.55.3.031107

Abstract

We have proposed and experimentally demonstrated a fiber-optic temperature sensing system based on an optoelectronic oscillator (OEO). A part of the fiber in the oscillator loop is used as the sensing fiber. As the free spectrum range (FSR) of the OEO is determined by the length of the oscillator loop, when the temperature of the sensing fiber is changed, the refractive index of the fiber varies; thus, the optical path length changes as well as the FSR of the OEO. By tracking one peak of the OEO harmonics, the temperature variation can be monitored. Therefore, the temperature variation can be converted to the frequency shift of the radio frequency signals. In the experiment, we have measured the spectra of the OEO with different temperatures, which show good sensing linearity. We have also measured the relationship between the sensing responsivity and the tracked frequency (1.0, 1.5, 2.0, and 3.0 GHz) in the experiment, which shows that the harmonics at a higher frequency produce a higher sensing responsivity. The proposed temperature sensing system exhibits good tunability, stability, linearity tailorable sensing responsivity, and ease of implementation, thus it shows good application potential in remote fiber-optical temperature sensing and monitoring.

Citation Download Citation

Hao Chen, Shiwei Zhang, Hongyan Fu, Hanqing Li, Dan Zhang, and Nan Chen "Fiber-optic temperature sensor interrogation technique based on an optoelectronic oscillator," Optical Engineering 55(3), 031107 (6 October 2015). https://doi.org/10.1117/1.OE.55.3.031107

Published: 6 October 2015

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