Effect of pulse chirp on distributed Brillouin fiber sensing

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URI: http://hdl.handle.net/10902/2538
ISSN: 1996-756X
ISSN: 0277-786X
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Author
Galíndez Jamioy, Carlos Augusto; Thévenaz, Luc
Date
2008-05-16
Derechos
© 2008 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Publicado en
Proceedings of SPIE, 2008, vol. 7004, 70044J
19th International Conference on Optical Fibre Sensors, Perth, 2008
Publisher
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
Brillouin fiber sensor
Chirp factor
Mach-Zehnder interferometer
Abstract:
The influence of the frequency chirp inherent to the generation of a pump pulse by a Mach-Zehnder intensity modulator is presented in the context of a distributed Brillouin sensor configuration. This frequency chirp depends on the pulse shape and its impact is related to the relative importance of the rising and falling edges with respect to the total pulse width. This results in a biased evaluation of the Brillouin frequency in regions where an abrupt change of this Brillouin frequency is observed.
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