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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): 22-24 |
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Ghahremani Moghadam M, Daraei A, Babakhani-Fard M, Zibaii M I. Simulation of a Chemical Sensor based on the Defective Photonic Crystal Fiber Structure. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :22-24
URL: http://opsi.ir/article-1-2498-en.html
URL: http://opsi.ir/article-1-2498-en.html
Mohammad Ghahremani Moghadam1 
, Ahmadreza Daraei *1 , Mohammad-Mahdi Babakhani-Fard2 , Mohammad Ismail Zibaii2
, Ahmadreza Daraei *1 , Mohammad-Mahdi Babakhani-Fard2 , Mohammad Ismail Zibaii2
1- Dept. of Physics, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran.
2- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
2- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Abstract: (1103 Views)
In this paper, a chemical sensor is designed and simulated based on the structure of a defective photonic crystal fiber. The computational results based on the finite element method (FEM) show that the geometry of the proposed sensor structure can detect the selected and optimal chemical sensing mode, with ethanol analyte, at a very small surface level of 0.4 μm2 with an extremely large sensitivity S~1550 nm/RIU. The geometry of the structure, though confining modes with a very small modal volume Vmode=0.0005(λ/nSiO2)3 in the defect region, drastically reduces light loss and by its resonance, provides a very high-quality factor of Q=3.1×108. In Addition, the structure supports evanescent modes with sufficiently large field amplitude and provides the basis for its use for chemical sensing based on refractive index changes.
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