Theoretical Study On Basic Characteristics Of Photonic Crystal Fibers And Their Applications In WDM Communication

The research included in this thesis is supported by National Basic Research Program of China (No.2003CB314900), the Key grant Project of Chinese Ministry of Education (No. 104046), National 863 High Technology Project of China (2003AA311010), and Science and Technology Project of Beijing Education Committee (No. XK100130437).Photonic crystal fiber (PCF, also called micro-structured fiber) is a new conception. Compare with standard fiber, PCF is a silica fiber with an array of air holes running down its length, it has many unusual properties, such as endless single mode operation, flexible tailorability of dispersion and modal area, high birefringence etc., which suggest a lot of potential applications in the field of optical communications and sensing. PCF has attracted a lot of scientific and technological interest, and is being developed at an incredible pace. In this thesis, Nonlinearity and effective area of photonic crystal fiber using finite difference Time domain mode solver have been researched. A wavelength tunable, high repetition rate mode-locked fiber ring laser, which is including PCF, also is demonstrated.1. Some basic characteristics of PCF have been studied by using FDTD; a lot of important results have been obtained.(1) The field distribution of PCF is investigated, the filed distribution is calculated and is shown to agree very well with experimental values.(2) The mode characteristics of the photonic crystal fibers (PCF) are investigated in detail by using the FDTD.(3) Research on effective area of photonic crystal fiber by changing the structure parameters of PCFs. Effective area depende with the air hole size and the pitch in...