Eight-bit full-light comparator based on quantum dot semiconductor optical amplifier

An all-optical comparator and optical amplifier technology, applied in the field of optoelectronics, can solve problems such as system orthogonality, signal drift, and non-reconfigurability

Inactive Publication Date: 2013-07-31
BEIJING JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

Comparator based on passive FBG array: The comparator implemented by FBG proposed by J.E.McGeehan and M.C.Hauer has a simple structure and low cost. The number of comparators is determined by the bits to be compared. However, when the signal rate changes or the communication network upgrades non-reconfigurable
The spatial 4-f comparator proposed by David F. Geraghty et al. realizes the identification of 4-bit 100Gb / s frame header signal, but the system has problems of orthogonality and signal drift

Method used

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  • Eight-bit full-light comparator based on quantum dot semiconductor optical amplifier
  • Eight-bit full-light comparator based on quantum dot semiconductor optical amplifier
  • Eight-bit full-light comparator based on quantum dot semiconductor optical amplifier

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Embodiment Construction

[0028] refer to Figure 1-7 Examples of the present invention will be described.

[0029] In order to make the above objects, features and advantages more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The specific technical scheme is as follows:

[0031] 1. Obtain the basic structure of quantum dot semiconductor optical amplifier through theoretical calculation.

[0032] In order to obtain QD-SOA suitable for signal processing, the QD-SOA with different structures is calculated by vasp software to obtain its basic energy level structure, and the dynamic characteristics of this QD-SOA are theoretically calculated.

[0033] 2. Realize all-optical XOR logic and non-logic.

[0034] The realization of the all-optical comparator of the present invention needs to use all-optical XOR logic and negation logic.

[0035] The implementation scheme of all-optical XOR logic...

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Abstract

The invention discloses an eight-bit full-light comparator based on a quantum dot semiconductor optical amplifier. The eight-bit full-light comparator comprises a logic Not gate composed of a Mach-Zehnder interferometer and a logic XOR gate composed of eight Mach-Zehnder interferometers, wherein the output of the former Mach-Zehnder interferometer is delayed to be used as a control signal of the next Mach-Zehnder interferometer, the control signal and a signal to be compared are input to the next Mach-Zehnder interferometer so as to be subjected to logic operation to obtain the cascade connection of an XOR comparative result, and the quantum dot semiconductor optical amplifier is used as a nonlinear element in the logic Not gate and the logic XOR gate. The signal processing speed of the full-light comparator can be up to 500Gb / s. The eight-bit full-light comparator is applied to high-speed signal processing so as to be suitable for the development of full-light networks.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an 8-bit all-optical comparator based on a quantum dot semiconductor optical amplifier. Background technique [0002] 1. Performance, Structure and Working Principle of Quantum Dot Semiconductor Optical Amplifier [0003] Semiconductor Optical Amplifier (SOA) is the key device to realize the next generation of flexible configuration optical network. It can not only perform signal amplification, but also realize all-optical signal processing, which is mainly based on the nonlinear effect of semiconductor materials. The nonlinear effects of SOA mainly include Cross Gain Modulation (XGM), Cross Phase Modulation (XPM) and Four Wave Mixing (FWM) effects. [0004] Semiconductor optical amplifiers are widely used in all-optical networks. As nonlinear devices, they can be used in optical signal processing such as optical switches, optical logic, and wavelength conversion. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F3/00
Inventor 张丽梅王智孙振超
Owner BEIJING JIAOTONG UNIV
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