Effect of pulse chirp on distributed Brillouin fiber sensing

被引：1
|
作者：
Galindez, Carlos A. [1 ]
Thevenaz, Luc [1 ]
机构：
[1] Swiss Fed Inst Technol, EPFL, Lab Metrol & Photon, CH-1015 Lausanne, Switzerland
来源：
19TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, PTS 1 AND 2 | 2008年 / 7004卷
关键词：
Brillouin fiber sensor; chirp factor; Mach-Zehnder interferometer;
D O I：
10.1117/12.786111
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
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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页数：4
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