DocumentCode :
3849465
Title :
A Novel Common Path Interferometric Technique for Vibration Measurement Based on Two Fiber-Optic Couplers
Author :
Lazo M. Manojlovic
Author_Institution :
Zrenjanin Technical College, Zrenjanin, Serbia
Volume :
11
Issue :
7
fYear :
2011
Firstpage :
1541
Lastpage :
1547
Abstract :
A novel common path demodulation technique for low-coherence fiber-optic sensors for vibration measurement based on two serially connected fused silica fiber-optic directional couplers is presented. A 2 × 2 coupler is used in the sensor arm and a 3 × 3 coupler serves as a receiving interferometer, providing at the same time two quadrature signals for the interferometric demodulation. A very stable output signal is obtained after the differentiate-and-cross-multiply procedure with the minimal detectable amplitude of the vibration of about 70 pm/√Hz.
Keywords :
"Optical fiber sensors","Optical fiber couplers","Couplers","Mirrors","Optical interferometry"
Journal_Title :
IEEE Sensors Journal
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2010.2096210
Filename :
5654529
Link To Document :
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