Distributed fiber Brillouin strain and temperature sensor with centimeter spatial resolution by coherent probe-pump technique

Lufan Zou; Xiaoyi Bao; Yidun Wan; Fabien Ravet; Liang Chen

doi:10.1117/12.623430

23 May 2005 Distributed fiber Brillouin strain and temperature sensor with centimeter spatial resolution by coherent probe-pump technique

Lufan Zou, Xiaoyi Bao, Yidun Wan, Fabien Ravet, Liang Chen

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623430
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

We present a sensing principle of the distributed fiber Brillouin strain and temperature sensor by coherent probe-pump technique that offers a new method to achieve centimeter spatial resolution with high frequency resolution. A combination of continuous wave (cw) and pulse source as the probe (Stokes) beam and cw laser as the pump beam have resulted in stronger Brillouin interaction of Stokes and pump inside the pulse-length in the form of cw-pump and pulse-pump interactions. We find that the coherent portion inside the pulse-length of these two interactions due to the same phase has a very high Brillouin amplification. The Brillouin profile originating from the coherent interaction of pulse-pump with cw-pump results in high temperature and strain accuracy with centimeter resolution, which has been verified by successfully detecting 1.5 cm out-layer crack on an optical ground wire (OPGW) cable.

Citation Download Citation

Lufan Zou, Xiaoyi Bao, Yidun Wan, Fabien Ravet, and Liang Chen "Distributed fiber Brillouin strain and temperature sensor with centimeter spatial resolution by coherent probe-pump technique", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623430

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