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The Study On Birefringence Photonic Crystal Fiber Pressure Sensor

Posted on:2012-11-25Degree:MasterType:Thesis
Country:ChinaCandidate:G F WuFull Text:PDF
GTID:2218330338463572Subject:Optical Engineering
Abstract/Summary:PDF Full Text Request
Optical fiber technology is an important frontier area of information technology, Photonic Crystal Fibers is a new generation of optical fiber developed based on photonic crystal technology. It have the optical property what the traditional fiber can't compared with, such as free single mode transmission, controlled dispersion, high birefringence and can be modified micro-structural design and so on. In recent years, photonic crystal fiber sensor has become a research hotspot.In this paper, a new type of high birefringence photonic crystal fiber is proposed. The cladding of the fiber is made of silica dioxide medium with air holes arranged as triangular lattice, two large air holes are introduced both above and below the core area, and the core area is filled with Polycarbonate (PC). First of all, the mode and the birefringence of the polarization-maintaining photonic crystal fiber are analyzed by plane wave expansion method, and the influence of structural parameters of the fiber on the birefringence is researched. Results show that the enlargement of large air hole diameter can effectively enhance the birefringence.Based on the study of the birefringence properties of photonic crystal fiber, Finite element method was used to analyze the pressure affecting on the photonic crystal fiber transmission characteristics. The results showed that the birefringence of photonic crystal fiber was changed by the pressure what leading to the phase of two polarization modes changed, the pressure sensing can be achieved by the measurement of phase. By analysing the factors of pressure sensor with changing the structural parameters, we obtained the fiber structural parameters of Large pressure sensitivity through a series of simulations.Finally, a photonic crystal fiber pressure sensor was designed, and the specific structure of the sensor components and material parameters were discussed.The advantages and disadvantages of the pressure sensor were analyzed by comparing several existing photonic crystal interferometric fiber pressure sensor.Pressure sensors in environmental monitoring applications were introduced at last.
Keywords/Search Tags:Plane Wave Expansion Method, Finite Element Method, Photonic crystal fiber, Birefringence, Pressure Sensor
PDF Full Text Request
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