All Optical Wavelength Converter And Its Application In Optical Network

In recent years, a focus on the study of optical fiber communication is All Optical Network (AON), and it is the necessarily developing result for optical network. The key techniques of AON include optical switching/routing, Optical Cross Connecting (OXC), All Optical Wavelength Conversion (AOWC) and all optical buffering, et al. Optical switching/routing is wavelength switching/routing in fact. OXC and WC are introduced into the cross nodes of gone network of AON, thus, a'virtual wavelength path'is established. Communication route can be formed by WC, only if there is empty wavelength in individual segment link. The use rate of wavelength is greatly increased. The blocking rate of network can be reduced evidently by adding WCs, especially for huge capacity, multiple nodes ones. WCs have been paid great attention in the basic research of optical communication, and used in some experiment networks. The main contribution of this dissertation is classified into five parts stated as follows.Firstly, AOWC is demonstrated by using a spectrum-sliced ASE in the SOA as the probe light and a delay interference configuration. Spectral response of the ASE output under the co-propagating injection by a signal light is analyzed theoretically. Analytical expressions for the ASE output in terms of power and phase changes in the wavelength conversion are deduced. An experimental system based on this scheme is built and its operation principles are introduced. System performances are investigated and several experimental results are presented.Secondly, a new scheme of variable optical delay line for IP packets is reported. It may be used in access control of HORNET (Hybrid Optoelectronic Ring Network) to avoid collision of added packet and the packet already on the ring and improve the loss rate of the packets. This architecture uses the wavelength converter to specify the packets delay and wavelength conversion is accomplished by the technique of FWM with a SOA. The architecture is impact and the ratio of performance to price is high.