Simultaneous measurement of temperature and RI based on an optical microfiber coupler assembled by a polarization maintaining fiber

2019 ◽  
Vol 114 (15) ◽  
pp. 151903 ◽  
Author(s):  
Li Zhao ◽  
Yundong Zhang ◽  
Yunhao Chen ◽  
Jinfang Wang
Keyword(s):  
Simultaneous Measurement ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Optical Microfiber

Research of Simultaneous Measurement of Temperature and Strain of Fiber Optic Cable Material

2012 ◽  
Vol 507 ◽  
pp. 30-33
Author(s):  
Xue Jun Zhang ◽  
Hong Tao Guo
Keyword(s):  
Simultaneous Measurement ◽  
Fiber Optic ◽  
Fiber Grating ◽  
Mean Square ◽  
Fiber Optic Cable ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Period Fiber Grating

Simultaneous measurement of strain and temperature was demonstrated by using a long-period fiber grating inscribed on a polarization-maintaining fiber. This paper analyses the intersect senstive questions in terms of strain and temperature of fiber optic cable material. It also proposes a new way to carry out simultaneous measurements of strain and temperature. Experimental results show mean square deviations of 15.6 με and 0.7°C for strain and temperature, respectively.

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.

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