Cascading structure of semiconductor optical amplifiers for realizing full optical logic AND gate and/or NOT gate

Abstract

The cascading structure is as following: CW light and signal light A are connected to the input end of the first coupler respectively; the output of the first coupler is connected to the first optical amplifier of semiconductor, first wavelength selector, and first power regulating device; signal light B is connected to the input end of the second coupler; output end of first power regulating device and output end of second power regulating device are connected to the input end of the second coupler; the output end of the second coupler is connected to second optical amplifier of semiconductor, second wavelength selector in sequence; through adjusting output powers of first power regulating device and second power regulating device can obtain full optical logic AND gate and / or NOT gate at different output wavelengths of the second wavelength selector. The invention realizes advantages of full optical logic device in crossed gain modulation type, and based on same class of structure.

Description

technical field [0001] The invention relates to a semiconductor optical amplifier (SOA) cascade structure, in particular to a semiconductor optical amplifier cascade structure for realizing all-optical logic gates. Background technique [0002] In recent years, the service range of IP business has developed from the initial simple E-mail to business and multimedia services. Various new services, such as videophone, high-definition television (HDTV), telemedicine, home office, etc., are booming. However, in the existing communication network based on electronic technology, each node of the network needs to complete the optical / electrical / optical conversion, and the electronic devices in it are limited by the upper limit rate of 40G. In terms of meeting the needs of high speed and large capacity, there are Such disadvantages as bandwidth limitation, clock skew, severe crosstalk, high power consumption, etc. have resulted in the phenomenon of "electronic bottleneck" in the com...

AI Technical Summary

Problems solved by technology

The disadvantage of cross-phase modulation all-optical logic devices is that precise phase control is required, which is difficult to achieve with discrete components, and integrated devices must be used

The disadvantages of the all-optical logic device of the cross-polarization modulation type are: the input light is required to have the same power, the same polarization state, and the wavelength is similar, which is not practical; the polarization state of the input and output light needs to be precisely controlled, which is difficult to achieve with separate components; the extinction ratio Not good, because adding a polarizer requires a preamplifier to compensate for loss and introduce spontaneous emission noise

The disadvantages of four-wave mixing all-optical logic devices are: to meet the phase matching conditions; limited by the conversion efficiency of four-wave mixing

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