Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal

A technology for modulating signal and regeneration device, which is applied in optics, nonlinear optics, optical waveguide coupling, etc. It can solve problems such as poor stability, high cost, and complex system, and achieve the effect of simple scheme, simple structure, and economical and practical scheme

Inactive Publication Date: 2012-01-04
SHANXI DATONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to realize the all-optical regeneration of DQPSK modulated signals, to solve the problems of complex system, high cost, poor stability, etc. in the current DQPSK signal regeneration methods, and to provide a new high-speed all-optical regeneration method and device for DQPSK modulated signals

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  • Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal
  • Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal
  • Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal

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Embodiment 1

[0039] Embodiment 1, all-optical regeneration device of high-speed DQPSK modulation signal

[0040] like figure 1 As shown, the device includes:

[0041] The first polarization controller 1: used to convert the deteriorated DQPSK signal light input on the transmission link to 45° linear polarization;

[0042] Differential group delay line: for the DQPSK signal converted by the first polarization controller to realize that the signals on the two polarization states of the x-axis and the y-axis have a delay of one symbol period;

[0043] The first optical coupler 4: used to divide the optical signal after differential group delay into two paths, the first path is used as the real part of the DQPSK signal, and the second path is used as the imaginary part of the DQPSK signal;

[0044] The first path includes: a second polarization controller 2, a second optical coupler 5, and a first polarization beam splitter 7. The real part of the first path DQPSK signal passes through the s...

Embodiment 2

[0053] Embodiment 2, the all-optical regeneration method of high-speed DQPSK modulation signal

[0054] The all-optical regeneration method of the high-speed DQPSK modulation signal in the present invention includes demodulation of the DQPSK signal, regeneration of the OOK signal, and generation of the DQPSK signal after regeneration. Specific steps are as follows:

[0055] The degraded DQPSK signal from the transmission line enters first figure 1 The DQPSK signal demodulation part of the shown regeneration device changes the polarization state of the deteriorated DQPSK signal into a 45° linear polarization state through the first polarization controller 1 (PC1);

[0056] Then the DQPSK signal passes through the differential group delay line (DGD), so that the signals on the two polarization states of the x-axis and the y-axis have a delay of one symbol period;

[0057] Then, the output of the differential group delay line DGD is divided into the same two channels through th...

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Abstract

The invention discloses a method and a device for all-optical regeneration of a high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal. The method comprises the following steps of: modulating the DQPSK signal; regenerating an on-off-keying (OOK) signal; and recovering the DQPSK signal. An aggravated DQPSK optical signal on a transmission link enters a demodulation unit of the DQPSK signal; the DQPSK signal is demodulated into the OOK signal, and simultaneously phase noises are converted into intensity noises; then an OOK signal regenerator performs amplituderegeneration on the optical signal; and finally, a polarization controller and a polarizer convert the OOK signal into the DQPSK signal to realize the all-optical regeneration of the DQPSK signal. Bythe method and the device, the all-optical regeneration of the DQPSK signal can be realized, a difficulty in the all-optical regeneration of the DQPSK signal is expected to be overcome, and a probable solution is provided for solving similar problems in high-speed optical signal processing.

Description

technical field [0001] The invention relates to the technical field of high-speed and large-capacity all-optical network communication, in particular to an all-optical regeneration method and device of a high-speed new modulation format. Background technique [0002] In recent years, wavelength division multiplexing technology, forward error correction coding, Raman distributed amplifiers, and new transmission optical fibers have greatly improved the capacity and distance of optical fiber communication systems. The modulation format of the optical fiber communication system mainly adopts the traditional On-Off-Keying (OOK), and a series of new modulation formats are gradually getting attention in the optical fiber communication system. chromatic dispersion, optical filtering, and nonlinear tolerance. These modulation formats include CRZ (Chirped Return to Zero), AMI (Alternate Mark Inversion), CSRZ (Carrier Suppressed Return to Zero), and PSK (Phase Shift Keying). At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35G02B6/27H04B10/155H04B10/556
Inventor 韩丙辰杨成全石云龙杨春花
Owner SHANXI DATONG UNIV
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