Method and device for erasing and interposing D8PSK/ASK orthogonal optical label based on EAM

Abstract

The invention relates to a method and a device for erasing and interposing a differential 8-phase shift keying / amplitude shift keying (D8PSK / ASK) orthogonal optical label based on an electro-absorption modulator (EAM). A coupler divides orthogonal optical label information into two paths with the same power; amplitude information in an orthogonal modulating signal is demodulated by an upper branch signal through an amplitude shift keying signal demodulator, and the demodulated amplitude information is logically negated and loaded onto an electricity input port of the EAM through a phase reverser; a lower branch signal is loaded onto an optical input port of the EAM after being delayed and amplified so as to erase the amplitude information on an optical carrier signal; and an optical band pass filter filters chirp of an optical carrier on which the old label information is erased, the filtered optical carrier is loaded onto the optical input port of the EAM after an Er-doped fiber amplifier amplifies the power of the filtered optical carrier, and new label information is loaded onto the amplitude of the optical carrier in an amplitude shift keying modulation mode so as to finish the interposing of a new label. The EAM does not have side effect on a load when the label is erased and interposed, and has chirp controllability, low driving voltage, low polarization sensitivity, small volume and low price, so that the whole network system has a simple structure and low cost, and promotes the development of the full optical label switching technology.

Description

technical field [0001] The present invention relates to the field of optical communication, in particular to a method and device for erasing and inserting a differential eight-phase shift keying / amplitude shift keying (D8PSK / ASK) orthogonal optical mark based on an electroabsorption modulator (EAM). Background technique [0002] The current status of the communication network is that the optical transmission network and the electrical switching network coexist, and a large number of optical / electrical, electrical / optical interface adaptation and rate matching operations between the two networks reduce the utilization rate of network resources and network performance. Due to the "speed bottleneck" of electricity and the "processing bottleneck" of light, neither the full power grid nor the full optical network is realistic. According to the current state of switching technology and the development level of devices, data information is exchanged in the optical domain, and contr...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the problems of poor extinction ratio, low speed and insufficient receiving sensitivity of the existing methods of differential eight-phase shift keying / amplitude shift keying orthogonal optical marker erasing and insertion, and provide a A new method of erasing and inserting markers to improve signal quality and extinction ratio, with simple structure and easy implementation

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