Font Size: a A A

Researches On The Photonic-Bandgap Fibers And The Application Of Photonic-Bandgap Fibers

Posted on:2010-09-23Degree:MasterType:Thesis
Country:ChinaCandidate:J DaiFull Text:PDF
GTID:2178360278965799Subject:Physical Electronics
Abstract/Summary:PDF Full Text Request
Photonic crystal fiber is divided into total internal reflection photonic crystal fiber (TIR-PCF) and Photonic-Bandgap Fiber (PBG-PCF) . The PBG-PCF breakthrough the Optical mode of the traditional fiber, which is Total Internal Reflection. The PBG-PCF transmites the light in the limited Low refractive index core.Compared with traditional optical fiber, The Photonic-Bandgap Fiber is fine with many unmatched features, such as: low loss, low non-linear, controllable transmission window, Dispersion controllability and so on. Photonic-Bandgap fiber has broad application prospects, including optical communication, medical, industrial and many other areas. Photonic crystal fiber sensor technology is one of the most important applications for the photonic crystal fiber. With the continuous development of society, the environment are subject to different threats, especially the uncontrolled discharge of the harmful gases and liquids, and the ribas mine explosion. These disasters should be will avoided by the timely and accurate detection of these substances. The research on optical fiber sensing technology has great significance in enhancing and promoting its application market. In this paper, we make theoretical research on the development and application of the Photonic-Bandgap fiber.1,Sum up the research process on the application of the photonic crystal fiber: the optical basic principles, classification, drawn ways, excellent features of the PBG-PCF have been Summaried. Outline several prominent advantages of the Photonic crystal fiber: Single-mode transmission characteristics, low loss, low non-linear effects and controllable dispersion characteristics. On this basis, introduce the advantages of using PBG-PCF in various field.2,Analyze and compare various theories of the photonic crystal fiber. Introduce the Calculation of Photonic bandgap using Plane Wave Method, and the Full-vector Finite Element Method.3,The development process and advantages of the fiber-optic sensors, the principle of absorption-type sensor are summarized. Analyze the feasibility and advantages of the band-gap-type photonic crystal fiber which is used for gas sensor. Design a theoretical model for the HC-PCF which is used for detecting the methane and acetylene. Use plane wave method to get drawn bandgap structure. Analyze the modes, dispersion, loss and other characteristics of band-gap-type photonic crystal fiber using COMSOL Multiphysics. Specific parameters are calculated for the fibers which are used for detecting the methane and acetylene gas. Test results show that the in-core transmission power are more than 90%, which shows that using HC-PCF in the gas sensor field can significantly improve the detection sensitivity.
Keywords/Search Tags:Photonic Crystal Fiber(PCF), Photonic bandgap (PBG), Full-vector finite element method, Fiber Sensor, Gas Absorption, Sensitivity
PDF Full Text Request
Related items