Share Email Print
cover

Optical Engineering

Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology
Author(s): An Sun; Bai Chen; Jialin Chen; Guoyang Li; Li Wang; Liping Chang; Zunqi Lin
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

We present a simple and practical method for the single-ended distributed fiber temperature measurements using microwave (11-GHz) coherent detection and the instantaneous frequency measurement (IFM) technique to detect spontaneous Brillouin backscattered signal in which a specially designed rf bandpass filter at 11 GHz is used as a frequency discriminator to transform frequency shift to intensity fluctuation. A Brillouin temperature signal can be obtained at 11 GHz over a sensing length of 10 km. The power sensitivity dependence on temperature induced by frequency shift is measured as 2.66%/K.

Paper Details

Date Published: 1 December 2007
PDF: 3 pages
Opt. Eng. 46(12) 124401 doi: 10.1117/1.2821209
Published in: Optical Engineering Volume 46, Issue 12
Show Author Affiliations
An Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Bai Chen, Shanghai Institute of Optics and Fine Mechanics (China)
Jialin Chen, Shanghai Institute of Optics and Fine Mechanics (China)
Guoyang Li, Shanghai Institute of Optics and Fine Mechanics (China)
Li Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Liping Chang, Shanghai Institute of Optics and Fine Mechanics (China)
Zunqi Lin, Shanghai Institute of Optics and Fine Mechanics (China)


© SPIE. Terms of Use
Back to Top