Theoretical Analysis And Experimental Research On All-optical3r Regeneration System For160Gb/s Multi-wavelength Signals Based On HNLF

The WDM technology has fully used the transmission window of the fiber, and itmake several optical service stream in single fiber. The WDM can flexibly broadenthe transmission bandwidth and decrease the multiplex cost. From the beginning, theWDM has had a good performance on the ratio of feature and price under the longtransmission so that its area has been increased greatly. But kinds of factors in thetransmission has limited the increase of bandwidth, such as GVD, PMD, kinds ofnonlinear effects and ASE of laser and OSA and so on. While3R regeneration cansolve these problems effectively. Right now it is usually to use the regenerationtechnology of optical-electrical-optical, but it is limited by the electrical field, whichcan deal with every wavelength separately so that its advantage in cost and reliabilitywill be greatly decreased with the increase of wavelength. The advantage of WDMwill be greatly advanced with the growth of the multi-wavelength all optical3Rregeneration.At present, there are lots of the single-wavelength all-optical3R regenerationreports, but the multi-wavelength all-optical3R regeneration is still at the initial stage.In order to complete the capacity of160Gb/s all-optical3R regeneration system, thispaper mainly research the technology based on spectral slicing of multicasttechnology and based on semiconductor optical amplifier SOA cross-phasemodulation XPM multicast technology. In this paper, we propose the multiwavelengthclock extraction scheme that is based on low Q value of FP filter+the asynchronousmode-locked fiber ring laser.In all-optical decision, in the fiber-based optical parametric amplification inall-optical3R regeneration FOPA system, it is generally used the pump light intensityto realize the clock signal retiming. However, this method can only be successfulregeneration of "1" code but not "0" code noise. In this paper, we use the multiplesignals, at the same time, as one pump, respectively, to filter out received idle light byits four-wave mixing with the clock signal. In order to achieve multi-wavelengthoptical decision technology, both in theory and experiment achieved relatively goodresults. Further we will use the orthogonal polarization technique and two-wayoperation to decrease the interference between the data pump. So that the3R regeneration of multiple wavelengths in the same device can be completed with theneed for regeneration of large number of wavelengths. It has great cost advantagecompared with the traditional3R regeneration.We successfully developed with independent intellectual property rights of a totalcapacity of160Gb/s (4wavelength40Gb/s),25multi-wavelength all-optical3Rregeneration prototype. The prototype uses a high-finesse FP filter for all-opticalclock recovery, to launch the more deterioration of the signal wavelength as the pumpand the clock into the high nonlinear optical fiber. With the use of highly nonlinearfiber four-wave mixing effects, we got in the idle light as the regeneration ofmulti-wavelength signal to enable multi-wavelength all-optical3R regeneration. Inorder to suppress inter-channel nonlinear harassed, we have adopted the technology oftwo-way orthogonal polarization, to reduce the interaction between the pump light, sothat the3R regeneration of multiple wavelengths in the same device can be completedin the existing WDM systems.