Simultaneous measurement of strain and temperature using a Fabry–Perot interferometer consisting of Bragg gratings in polarization-maintaining fiber and current-modulated laser diodes

2017 ◽  
Vol 56 (3) ◽  
pp. 032502 ◽  
Author(s):  
Atsushi Wada ◽  
Satoshi Tanaka ◽  
Nobuaki Takahashi
Keyword(s):  
Simultaneous Measurement ◽  
Laser Diodes ◽  
Bragg Gratings ◽  
Fabry Perot ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining

Analysis of a Polarization-Maintaining Optical Fiber Interferometer for Simultaneous Measurement of Acoustic Pressure and Temperature

1997 ◽  
Vol 119 (3) ◽  
pp. 398-403 ◽  
Author(s):  
B. Chiu ◽  
M. C. Hastings
Keyword(s):  
Simultaneous Measurement ◽  
Acoustic Pressure ◽  
Axial Strain ◽  
Small Diameter ◽  
Sensing Element ◽  
Cross Sensitivity ◽  
Fabry Perot ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
The Cross

An all polarization-maintaining fiber Mach-Zehnder interferometer for simultaneous measurement of acoustic pressure and temperature is examined. Measurements by Farahi et al. (1990) indicate that the cross-sensitivity between temperature and axial strain may be significant for a polarization-maintaining fiber Fabry-Perot interferometer; however, no one has examined the significance of cross-sensitivity for the Mach-Zehnder case. Sensitivities to acoustic pressure and temperature, and the cross-sensitivity generated by simultaneous disturbances are determined both analytically and numerically. The fiber’s relatively high temperature sensitivity compared with its acoustic pressure sensitivity suggests that a short length of sensing fiber is sufficient for use as a temperature sensor with little or no interference from acoustic pressure. To measure acoustic pressure, however, a straight length of the fiber examined in this study is not sufficient. In practice, this sensing fiber could be coiled around a compliant cylinder or into a small diameter sensing element to enhance longitudinal strain and thus sensitivity. Results show that in either case, the cross-sensitivity is extremely small and can be ignored.

Fiber Fabry-Perot Interferometric Sensor Using Bragg Gratings in Polarization Maintaining Fiber

2015 ◽  
Vol 33 (12) ◽  
pp. 2499-2503 ◽  
Author(s):  
Ryotaro Uchimura ◽  
Atsushi Wada ◽  
Satoshi Tanaka ◽  
Nobuaki Takahashi
Keyword(s):  
Bragg Gratings ◽  
Fabry Perot ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Interferometric Sensor
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