DocumentCode
2161046
Title
Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis
Author
Jeong, Jiho ; Lee, Kwanil ; Song, Kwang Yong ; Jeong, Je-Myung ; Lee, Sang Bae
Author_Institution
Photonics Res. Lab., Korea Inst. of Sci. & Technol. (KIST), Seoul, South Korea
fYear
2011
fDate
18-22 Sept. 2011
Firstpage
1
Lastpage
3
Abstract
We present theoretical and experimental analysis of the beat noise occurring in distributed fiber sensors based on Brillouin optical correlation domain analysis (BOCDA). The origin of the beat noise turns out to lie in the variation of the Brillouin gain induced by the chopping of the intensity-modulated pump wave in the lock-in detection applied for the signal processing of a BOCDA system. Additionally, a variable-frequency lock-in detection technique is suggested as an effective way of the noise suppression.
Keywords
fibre optic sensors; modulation; noise; Brillouin gain; Brillouin optical correlation domain analysis; beat noise; distributed fiber sensors; intensity-modulated pump wave; noise suppression; signal processing; variable-frequency lock-in detection; Frequency modulation; Optical fiber sensors; Optical fibers; Optical modulation; Optical pumping; Scattering;
fLanguage
English
Publisher
ieee
Conference_Titel
Optical Communication (ECOC), 2011 37th European Conference and Exhibition on
Conference_Location
Geneva
ISSN
Pending
Print_ISBN
978-1-4577-1918-9
Type
conf
Filename
6066042
Link To Document