All-optical Regeneration Technology In Optical Packet Switching Applied Research

As telecommunications and computer communications continue to converge, data traffic is gradually exceeding telephony traffic. This means that many of the existing connection-oriented or circuit-switched networks will need to be upgraded to support packet-switched data traffic. Of all the switching schemes, optical packet switching appears to be a strong candidate because of the high speed, data rate/format transparency, and configurability it offers. It is our belief that all-optical packet switching will eventually emerge as one such technology, which will significantly impact on next generation networks. Optical signals are susceptible to impairments caused by attenuation, noise, dispersion, crosstalk, jitter, and nonlinear effects. As the transmission span, number of wavelength channels per fiber, and bit rate per channel increase, transmission impairments become more s e r i o u s a n d l e a d t o s i g n i f i c a n t a m p l i t u d e l o s s , p u l s e -s h a p e distortion, and timing drifts. It is often required to recover the original signal shape and clean it up from impairments for further transmission and switching in the network. All-optical regeneration is the most promising technique for the restoration of these signal impairments. Because it performs the same signal-restoring functions as in the OE solution, but with reduced complexity, band-limited electronics, higher optical bandwidth and enhanced capabilities. Regeneration can be either 2R for signal reshaping , or 3R for both signal reshaping and retiming . The main work ,contribution, and feature of the paper are as following: In chapter 1, the status and perspective of optical packet switching are introduced In chapter 2,the status of all-optical regeneration and its application in OPS are introduced. In chapter 3, an all-optical regenerator based on self-phase and cross-phase in fiber has been researched. The noise suppression in...