A novel distributed sensor using optical fiber

Junguo Yuan; Chun Zhan; Qizhen Sun; Deming Liu; Yi He

doi:10.1117/12.635145

5 December 2005 A novel distributed sensor using optical fiber

Junguo Yuan, Chun Zhan, Qizhen Sun, Deming Liu, Yi He

Proceedings Volume 6019, Passive Components and Fiber-based Devices II; 60191C (2005) https://doi.org/10.1117/12.635145
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

Abstract

A new distributed interferometic sensor for strain and vibrations measurement is proposed in this paper. It measures the first simultaneous information by using Mach-Zehnder Interferometer. We illustrate important points in regard to the proposed distributed signals measurement, and present the preliminary results on the application of optical fiber interferometic sensor (OFIS) for the measurements of distributed signals in long-distance region, and discuss the principles of distributed OFIS based on long-length Mach-Zehnder interferometic technique. We also adopt a new technique by using optical delay effect to improve the spatial resolution of distributed interferometic sensor. It is completely different from the spatial-resolution technique of optical time-domain reflectometry (OTDR). This type of OFIS has better sensitivity and resolution than the others. In addition, this paper describes a form of passive phase demodulation for recovering a signal of interest from a Mach-Zender optical fiber interferometric sensor. It achieves a 100Hz-2KHz frequency of vibrations resolution, with 100-m practical spatial resolution, over a sensing length of 6.8 km. At the time of writing, the system is only partially completed; therefore the content of this paper will focus on the principle of distributed sensor. The results mainly are presented in laboratory.

Citation Download Citation

Junguo Yuan, Chun Zhan, Qizhen Sun, Deming Liu, and Yi He "A novel distributed sensor using optical fiber", Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 60191C (5 December 2005); https://doi.org/10.1117/12.635145

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