Enhanced Φ-OTDR system for quantitative strain measurement based on ultra-weak fiber Bragg grating array

Xuping Zhang; Zheng Guo; Yuanyuan Shan; Zhenhong Sun; Siyi Fu; Yixin Zhang

doi:10.1117/1.OE.55.5.054103

9 May 2016 Enhanced Φ-OTDR system for quantitative strain measurement based on ultra-weak fiber Bragg grating array

Xuping Zhang, Zheng Guo, Yuanyuan Shan, Zhenhong Sun, Siyi Fu, Yixin Zhang

Author Affiliations +

Optical Engineering, Vol. 55, Issue 5, 054103 (May 2016). https://doi.org/10.1117/1.OE.55.5.054103

Abstract

Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has been widely used in various applications for its distributed measurement capability of dynamic disturbance. However, traditional Φ-OTDR cannot realize quantitative measurement of the strain variation introduced by the external disturbance. Recently, an ultra-weak fiber Bragg grating (UWFBG) array-based Φ-OTDR system has been proposed to realize quantitative measurement. Unfortunately, the spatial resolution in this system is not satisfactory, since spatial resolution is equal to UWFBGs interval and the interval cannot be too small. We have proposed an enhanced system to realize quantitative strain measurement and high spatial resolution monitoring by combining ordinary Φ-OTDR system with the UWFBG array-based Φ-OTDR system. Experimental results showed that quantitative strain measurement at the end of a 5-km long sensing fiber could be realized with a spatial resolution of 4 m while the interval between adjacent UWFGBs was 50 m.

Citation Download Citation

Xuping Zhang, Zheng Guo, Yuanyuan Shan, Zhenhong Sun, Siyi Fu, and Yixin Zhang "Enhanced Φ-OTDR system for quantitative strain measurement based on ultra-weak fiber Bragg grating array," Optical Engineering 55(5), 054103 (9 May 2016). https://doi.org/10.1117/1.OE.55.5.054103

Published: 9 May 2016

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