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The Research On Optical Information Processing Technologies In Optical Packet Switching Networks

Posted on:2009-09-16Degree:DoctorType:Dissertation
Country:ChinaCandidate:L L YiFull Text:PDF
GTID:1118360242483555Subject:Communication and Information System
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In China, from 2000 to 2006, the exporting amount of the Internet data has been increased from 351Mbps to 136106Mbps, and the increasing ratio is about 6 times within 6 years. The increase of network bandwidth mainly comes from the quickly increasing of the data service. In the future, the optical network will develop towards packet switching, supporting versatile services, integrated switching of optics and electronics, merging of transmission and switch, security and efficiency, flexible networking etc. Optical packet switching is the ideal switching mode, and it is also recognized as the final goal of optical switching configuration. The main advantages of OPS include high bandwidth efficiency and providing all kinds of services so as to meet different customers'requirements. The purpose of the OPS network is transferring large amount of switching services from electrical to optical domain so as to match the switching capabilities of OPS network with the transmission capabilities of wavelength division multiplexing (WDM) system. The key technologies in the OPS network include optical switch, optical logic operation, wavelength conversion and optical buffer etc. The optical switch is the core functional component of OPS networks, which is used to realize the switching and routing of signals. The optical logic operation can be used to detect, process and rewrite of the labels, which is expected to realize the future optically controlled optical switch. The function of wavelength conversion is to solve the wavelength conflict of the network and improve the flexibility of the network. The most important and indispensable component in OPS network is the optical buffer, which is used for storing the data packet to solve the time conflict of signals. Furthermore, all the components described above induce signal loss, therefore in OPS networks, optical amplifiers are mandatory used. The optical amplifiers working in OPS networks should feature the function of broad bandwidth and gain clamping. Only all the technologies are fully developed, the truly all-optical network can be realized. For accelerating the development of OPS networks, our thesis focus on the researches of the key technologies as follows:1. SOA and phase modulator(PM)-Sagnac interferometer based ultra-fast optical switchOptical switch is the core functional component of the OPS network. Normally, an OPS network requires a large scale and ultra-fast optical switch matrix, therefore ultra-fast (
Keywords/Search Tags:all-optical network, optical packet switching (OPS), erbium-doped fiber amplifier (EDFA), stimulated Brillouin scattering (SBS), fiber optical parametric amplification (FOPA), semiconductor optical amplifier (SOA), slow light, optical logic gate
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