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Method for achieving all-optical logic and operation based on light absorption bleaching effect

A technology of optical logic and light absorption, which is applied to logic circuits using optoelectronic devices, logic circuits using specific components, logic circuits, etc., can solve problems such as low integration, complex systems, and poor stability, and achieve high integration, The system is simple and stable

Active Publication Date: 2013-05-08
宁夏中科瑞达光电科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for realizing all-optical logic and operation based on the bleaching effect of light absorption, which solves the problems of complex system, slow response speed, poor stability and low integration in the prior art

Method used

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  • Method for achieving all-optical logic and operation based on light absorption bleaching effect
  • Method for achieving all-optical logic and operation based on light absorption bleaching effect

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Embodiment

[0035] The laser adopts a titanium sapphire femtosecond pulse laser with a wavelength of 800nm, the pulse width is 100fs, the beam divergence angle is less than 0.002rad, the pulse energy is about 500nJ, the repetition frequency is set to 20MHz, and the spot diameter at the light outlet is less than 3mm; The lens divides a beam into two beams, beam A and beam B; the optical path difference between beam A and beam B is set to 0.09-0.3mm, that is, the time delay is 300-1000fs.

[0036] The semiconductor crystal adopts unintentionally doped semi-insulating gallium arsenide crystal, and the dislocation density (EPD) is less than 5×10 4 cm -2 , the crystal orientation is (100)±0.5°, and the carrier lifetime is less than 10ns. Considering that the absorption depth d of gallium arsenide crystals to 800nm ​​wavelength laser is about 10 μm, the gallium arsenide crystals are mechanically and chemically thinned first, and then the thickness D of gallium arsenide crystals is locally etch...

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Abstract

The invention discloses a method for achieving all-optical logic and operation based on light absorption bleaching effect. The steps of the method comprise that an incidence light beam A and an incidence light beam B are respectively used as input signals of optical logic and operation to be lighted on a semi-conductor crystal, a receiver is arranged on the outgoing direction of the semi-conductor crystal, transmission light C is used as an output signal to be detected and acquired by the receiver, if only the light beam B exists, the light beam A does not exist, the bleaching effect is achieved, the transmission light C received by the receiver is smaller than a light intensity threshold value with the logic true, if and only if the light beam A and the light beam B irradiate on the same zone, based on the bleaching effect, the transmission light C received by the receiver is larger than the light intensity threshold value with the logic true. The method does not rely on resonance, polarization, interference, a photonic crystal or optical fiber nonlinear effect and other mechanisms, a system is simple, stability is good, and integration level is high.

Description

technical field [0001] The invention belongs to the field of optical information processing and semiconductor technology, and relates to a method for realizing all-optical logic and operation based on the bleaching effect of light absorption. Background technique [0002] With the rapid development of computer technology in today's world, the development of any kind of technology will be limited by its inherent physical characteristics, and electronic computers are no exception. The speed of electronic computing is limited, and with the maturity of VLSI technology, the degree of integration is almost saturated, so the potential of integrated circuit electronic computers has almost been tapped. [0003] The speed of light is three orders of magnitude greater than the saturation drift speed of electrons, so in theory, the calculation speed of all-optical calculations is more than 1000 times faster than that based on electronic devices, and the crossing of beams will not affect...

Claims

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Application Information

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IPC IPC(8): G02F3/00G02F1/35
Inventor 王馨梅闫延辉纪卫莉张琳张苗苗
Owner 宁夏中科瑞达光电科技有限公司
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