Method and device for eliminating code pattern effect through red shift chirp characteristic

Abstract

The invention discloses a method and device for eliminating the code pattern effect through the red shift chirp characteristic and relates to the technical field of photoelectronics. The nonlinear cross modulation effect in a semiconductor optical amplifier is mainly utilized for the method, and data information carried by pump light is modulated to probe light; pump light is filtered out through a square wave filter, the red shift chirp component is extracted, meanwhile, a normal-phase probe light output signal is acquired, and at the moment, the output probe light is accompanied by a certain code pattern effect; according to the characteristic that large red shift probe light has a high output light intensity, a Gaussian filter is made to work on a sloping transmission curve at low output light intensity corresponding to large wavelength, and the probe light signal is shaped to eliminate the code pattern effect. The chirp characteristic of the semiconductor optical amplifier and the advantages generated by combination of the filters are fully utilized, and thus the full-optical signal processing speed is increased. Through the red shift chirp characteristic, the normal-phase output signal can be directly obtained; through combination of the filters, the defect that the output signal has the code pattern effect is overcome.

Description

technical field [0001] The invention relates to the technical field of all-optical signal processing in optoelectronic technology, in particular to a method and a device for eliminating pattern effects by using red-shift chirp characteristics. Background technique [0002] The optical fiber communication network has developed into the main network in the communication, and the huge bandwidth demand puts higher and higher requirements on the optical communication network. In terms of optical transmission, with the application of wavelength division multiplexing and breakthroughs in optical amplification technology, the transmission capacity of optical fibers has increased rapidly, which has far exceeded the bandwidth requirements of current optical networks. However, in terms of optical switching, the traditional "optical-electrical-optical" conversion will inevitably make the communication rate face an electronic bottleneck due to the limitation of the characteristics of the...

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention solves the problem in the prior art that the pattern effect of the output signal of the redshift detuning filter is serious by providing a method and device for eliminating the pattern effect by using the redshift chirp characteristic, so that the redshift output The signal has a technical problem of low signal-to-noise ratio, which can eliminate the pattern effect and improve the signal-to-noise ratio

Images