PSP-BOTDA Utilizing Imaginary Part of Brillouin Gain Coefficient

Yuki MIYAMOTO  Tsuneo HORIGUCHI  Keisuke KAWANA  Tomoe TSUKINOKIZAWA  Makoto SHINOZAKI 

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)  Vol.J92-B  No.11  pp.1788-1795
Publication Date: 2009/11/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: PAPER
Category: 
Keyword: 
distributed fiber sensing,  Brillouin scattering,  PSP-BOTDA,  Brillouin distributed measurment, 

Full Text(in Japanese): PDF(624.4KB)

Summary: 
We have proposed a Phase Shift Pulse Brillouin Optical Time Domain Analysis (PSP-BOTDA) previously. This paper reports a new kind of PSP-BOTDA which uses both +π/2 and -π/2 phase shift pulses as its pump lights. It is shown that the Brillouin spectrum obtained by using this new PSP-BOTDA corresponds to the imaginary part of the Brillouin gain coefficient, and that it has linear frequency characteristics around the Brillouin frequency shift.