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Research on Birefringence and Bandgap of Several Kinds of Photonic Crystal Fibers

Author: ZhouHongSong
Tutor: LiShuGuang
School: Yanshan University
Course: Optics
Keywords: Photonic crystal fiber Birefringence Bandgap Dispersion Loss
CLC: TN253
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 0
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Abstract


Photonic crystal fiber can not be compared with the traditional optical fiber dispersion , high birefringence and unique bandgap characteristics , which makes photonic crystal fiber , polarization maintaining the pulse transmission devices and sensors have important applications . Photonic crystal fiber different mechanism of their light guide is divided into the refractive index of the guide -type photonic crystal fibers and photonic band gap photonic crystal fiber . The paper numerically studied several photonic crystal fiber birefringence and bandgap characteristics , the main contents are as follows: First , the design of a double-clad high birefringence photonic crystal fiber , the fiber birefringence multipole method , dispersion and loss characteristics . Numerical simulations show that the improved photonic crystal fiber 10-2 magnitude high birefringence , and the pairs of zero-dispersion is achieved in the near infrared range , wherein a zero dispersion point located in the light - emitting range of the titanium sapphire laser . Important applications of such a double- zero dispersion photonic crystal fiber supercontinuum generation femtosecond laser transmission . Secondly , the plane wave expansion method to study the bandgap properties of chalcogenide glass hollow-core photonic crystal fiber chalcogenide glass hollow-core photonic crystal fiber dispersion and loss characteristics of the band gap , on this basis , the research and the study of these properties with the duty cycle changes . The analog data show that chalcogenide glass hollow-core photonic crystal fiber papers designed to achieve maximum duty cycle of 75% to 85% within the band gap . Studied the variation with wavelength in the dispersion and loss of the largest band gap , and found that as long as the seven-layer air holes loss can achieve 0.1 dB / m . Finally, the study of two oval-shaped center air porous silica glass hollow-core photonic crystal fiber birefringence and bandgap properties of simulated data show that both band gap optical fiber in a 1.55μm communication wavelength birefringence of 6.07 × 10 < sup> -3 and 1.06 × 10 -3 < / sup> , and both fiber both bandgap transmission good polarization maintaining characteristics .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
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