Circulation demodulation method for 1.55μm Raman temperature sensors
-
1.
School of Opto-eletronic Information, University of Electronic Science & Technology of China, Chengdu 610054, China
-
Corresponding author:
LIU Yong-zhi, yzliu123@uestc.edu.cn
;
-
Received Date:
2005-03-14
Accepted Date:
2005-06-13
-
Abstract
Because the isolation performance of Raman filter is not high,a new demodulation method is proposed to suppress the system background noise,heat excursion accumulation and anti-Stokes backward scattering intermingled with Rayleigh backward scattering.The new method can improve the temperature precision,stability and sensitivity of system and reduce the system cost with the constant temperature groove abrogated.The experimental results show its measurement precision is better than 0.05℃.
-
-
References
|
[1]
|
ZHANG Z X,LIU T F,ZHANG B X et al.Laser Raman type distributed optical fiber temperature sensor system[J].Acta Optica Sinica,1995,15 (11):1585～1589 (in Chinese). |
|
[2]
|
ZHANG Z X,SHEN W M,GUO N et al.A Demodulated method of distributed optical fiber Raman photons sensors system[J].Acta Photonica Sinica,1998,27 (5):467～471 (in Chinese). |
|
[3]
|
XIE A D,SHI D H,CHEN Y K et al.Temperature measurement sensitivity of a practical real-time temperature measurement system[J].Laser Technology,2004,28 (6):625～629 (in Chinese). |
|
[4]
|
LUSh D,JINX D.Design of a fiber optical thermometer[J].Laser Technology,1995,19 (6):338～340 (in Chinese). |
|
[5]
|
LEES G P.Advances in fiber distribtuted temperature sensing using the Landau-Placzed ratio[J].IEEE Photonics Technology,1998,10(1):126～128. |
-
-
Proportional views
-
Map
DownLoad: