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year 28, Issue 1 (1st Iranian Conference on optical fiber sensors (ICOFS 2021) 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 28(1): 79-81 |
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Rajabi Firoozabad A, Ranjbar Naeini O R, Mirzaei M, Latifi H. Fabrication of optical fiber Fabry-Perot strain sensor based on the Vernier effect. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :79-81
URL: http://opsi.ir/article-1-2519-en.html
URL: http://opsi.ir/article-1-2519-en.html
1- Dept. of Physics, Faculty of Basic Sciences, shahid Beheshti University Tehran, Iran
2- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
3- Dept. of Physics, Faculty of Basic Sciences, shahid Beheshti University Tehran, Iran, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
2- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
3- Dept. of Physics, Faculty of Basic Sciences, shahid Beheshti University Tehran, Iran, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Abstract: (601 Views)
In this study, a pair of Fabry-Perot (FP) interferometers were used to construct an optical fiber sensor more sensitive than a single optical FP fiber sensor. In order to construct these interferometers, hollow-core fibers were combined and put between a pair of single-mode fibers. In the case of these interferometers, one was used as a reference while the other one was utilized as a sensing interferometer. Sensors integration was accomplished by a 50/50 coupler. We obtained 12.23 (pm ⁄μɛ) sensitivity within the dynamic ranges 0-4000 μɛ, which are approximately 13 times greater than a single optical fiber FP sensor. Since there is a need for temperature compensation in the field of strain measurement, the complex optical Vernier effect has been used in the temperature range of 40-75°C, resulting in wavelength variations of 40pm.
Keywords: Fabry-Perot interferometer, optical fiber sensor Vernier effect, complex Vernier effect, strain sensor
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