Analysis Of Photonic Crystal Fiber And All-Optical Switching Based On Photonic Crystal Fiber

The work included in this thesis is supported by National Basic Research Program of China. (No.2003CB314900), National 863 High Technology Project of China (No.2003AA311010), the Key grant Project of Chinese Ministry of Education (No. 104046), and Co-constructed Project of Education Board of Beijing (No. XK100130437).Photonic crystal fiber (PCF) is a new kind of silica fiber with periodical structure in the cladding. It has many unusual properties compared to standard fibers, such as endless single mode operation, flexible tailorability of dispersion and modal area, high birefringence etc. The adjustable properties of PCF suggest a lot of potential applications in the field of optical communications. For example, PCF can be used for broadening operation wavelength range, dispersion compensation, pulse compression, short wavelength soliton transmission and ultra-broadband continuum generation etc. and can also be used to make optical devices based on PCF.In this thesis, the fundamental theory of PCF are summarized systemically, including fabrication methods, basic properties and applications, the numerical study method and development actuality. The field transmission characteristics of PCF has been numerically simulated, and the experiment on all-optical switch based on photonic crystal fiber (PCF) are performed. The main contents are listed as follows:1. The theoretical models of PCF are analyzed. The orthogonal function method, which could describe the index and field distribution accurately, and have very good computing time and precision, was chosen as numerical study method of this thesis.2. The field characteristics of PCF are analyzed using the orthogonal function method. The field distribution is showed and the effective area, numerical aperture of PCF are calculated. The effects of the structural parameters on effective area are studied, some actual applications of large or small mode area photonic crystal fibers are discussed.3. The dispersion properties of PCF are studied. The effects of structure parameters on dispersion characteristic are analyzed. Three useful structure design schemes of PCF are proposed, include: PCF with zero-dispersion at 800nm, flattened...