Signal-to-noise ratio improvement in Brillouin optical correlation domain analysis combining Brillouin gain and loss effects

Chongjiu Jin; Weiwen Zou; Jianping Chen

doi:10.1117/12.970481

17 October 2012 Signal-to-noise ratio improvement in Brillouin optical correlation domain analysis combining Brillouin gain and loss effects

Chongjiu Jin, Weiwen Zou, Jianping Chen

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842114 (2012) https://doi.org/10.1117/12.970481
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A novel scheme is proposed to measure Brillouin gain spectrum in an optical fiber combining Brillouin gain and loss effects. A dual-parallel Mach-Zehnder modulator is used to generate upshifted afterward downshifted single sideband with suppressed carrier by periodically chopping the dc bias. The two successive single sidebands serve as Brillouin pump and probe waves to amplify and absorb the carrier wave for lock-in detecting of the net Brillouin gain between Brillouin gain and loss effects. The signal-to-noise ratio of the cost-effective measurement system with fewer optical devices is twofold enhanced. Distributed strain sensing ability with a nominal spatial resolution of 1.6 cm is experimentally demonstrated by utilization of this scheme into a Brillouin optical correlation domain analysis system.

Citation Download Citation

Chongjiu Jin, Weiwen Zou, and Jianping Chen "Signal-to-noise ratio improvement in Brillouin optical correlation domain analysis combining Brillouin gain and loss effects", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842114 (17 October 2012); https://doi.org/10.1117/12.970481

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