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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 325-328 |
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Adibnia S, Shahshahani F, Karimi M. Theoretical Modeling of Optical Fiber Refractive Index Sensor with Grating Structure Based on the Lossy Mode Resonance. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :325-328
URL: http://opsi.ir/article-1-2050-en.html
URL: http://opsi.ir/article-1-2050-en.html
1- Physics Department, Alzahra University, Tehran, Iran
2- Plasma Research School, Nuclear Science and Technology Research Institute, Tehran, Iran.
2- Plasma Research School, Nuclear Science and Technology Research Institute, Tehran, Iran.
Abstract: (1714 Views)
In this paper, a fibre-refractive index sensor with a Bragg grating based on the lossy mode resonance is theoretically investigated. In this sensor, a small portion of the fibre cladding is removed and covered with a thin layer such as ITO that is the transparent conductive oxide. This sensor has been studied in two grating structures with phase shift and without phase shift and the performance of these two structures are compared. The simulation results show that the sensor structure with π / 2 phase shift in the middle of the grating has a higher accuracy coefficient than the structure without phase. The accuracy of the sensor depends on the coupling coefficient and the increasing coupling coefficient causes the increasing accuracy of sensor in the structure with phase shift.
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