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A qpsk-to-bpsk all-optical modulation format conversion method based on phase-sensitive amplification

A format conversion and phase technology, applied in electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve problems such as loss

Active Publication Date: 2020-03-06
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention provides an all-optical conversion method for optical vector signal modulation formats suitable for flexible optical networks, aiming at solving the problem of converting one QPSK signal into one BPSK signal in the transmission link of the optical network, and ensuring the existing advantages of the current method. information loss problem

Method used

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  • A qpsk-to-bpsk all-optical modulation format conversion method based on phase-sensitive amplification
  • A qpsk-to-bpsk all-optical modulation format conversion method based on phase-sensitive amplification
  • A qpsk-to-bpsk all-optical modulation format conversion method based on phase-sensitive amplification

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Embodiment

[0043] This embodiment is based on the image 3 The overall block diagram of the format conversion system shown is described to verify the system performance of the conversion system designed in the present invention.

[0044] Such as image 3 As shown, a QPSK signal with a bit rate of 20-Gbps is modulated on a continuous light with a wavelength of 1551.72nm, and its power is set at 10mW. In order to simulate the QPSK signal in the link transmission, before the signal enters the conversion system, a certain amount of spontaneous emission noise (ASE noise) is artificially added to make image 3 The signal-to-noise ratio (OSNR) of node A is 25dB. After the signal enters the conversion system, it will enter the phase decomposition system and the parallel conversion system successively. The phase decomposition system consists of two PSAs, among which the pump 1 (pump1) and pump2 of the I-way PSA (PSA-I) are set at 1552.12nm and 1551.32nm, and their powers are both 51mW. The no...

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Abstract

The invention discloses a QPSK-to-BPSK all-optical modulation format conversion method based on phase sensitive amplification in an optical fibre transmission network. The QPSK-to-BPSK all-optical modulation format conversion method comprises a phase decomposition process and a parallel-serial conversion process. Multiple factors, such as the raw information integrity, the receiving complexity of a receiver, channel and system noise, are comprehensively considered in the method. The QPSK-to-BPSK all-optical modulation format conversion method disclosed by the invention is simple in principle and wide in application range; the error code performance of an original signal can be effectively improved while the fact that a QPSK signal is converted into a BPSK signal is realized; therefore, the signal transmission distance is prolonged; and simultaneously, the QPSK-to-BPSK all-optical modulation format conversion method is also suitable for the fields, such as flexible transmitters and receivers in a software-defined flexible optical network.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a method for realizing conversion between one-to-one modulation formats in an optical fiber transmission network. This method is mainly used to convert a QPSK (quadrature phase shift keying) signal into a BPSK (binary phase shift keying) signal and ensure the integrity of the original information, which can effectively extend the signal transmission distance and reduce the complexity of the receiver, and is applicable to Software-defined flexible optical network technology field. Background technique [0002] Optical signal modulation refers to the process of carrying information in a circuit to an optical carrier in a different format. Different modulation formats have different characteristics. At present, due to the surge in demand for communication capacity and the increasingly tight spectrum resources, advanced modulation formats such as MPSK (multiple ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/548H04B10/516
CPCH04B10/5161H04B10/548
Inventor 纪越峰崔嘉斌王宏祥
Owner BEIJING UNIV OF POSTS & TELECOMM