Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Dual-Wave Transmission System Based on Implicit Conjugation

A transmission system and conjugate technology, applied in the field of nonlinear optical signal transmission and processing, can solve the problems of decreased spectrum utilization, reduced transmission capacity, low effective transmission efficiency, etc., and achieves suppression of first-order nonlinear effects and high tolerance , the effect of improving spectrum utilization

Active Publication Date: 2019-11-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this technology needs to construct phase-conjugated dual wavelets, the transmission of conjugated signals will reduce the spectrum utilization by half and reduce the transmission capacity by half. bottleneck

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Dual-Wave Transmission System Based on Implicit Conjugation
  • A Dual-Wave Transmission System Based on Implicit Conjugation
  • A Dual-Wave Transmission System Based on Implicit Conjugation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] by figure 2 The transmission of the dual polarization state 4psk modulated signal is taken as an example for detailed description.

[0024] The transmitting end divides the optical carrier generated by the laser into two orthogonal paths through the polarization beam splitter. After the bit stream is modulated and mapped, two modulated signals are generated. The lights in the two polarization directions are respectively input to the optical phase modulator, which adopts the 4PSK modulation sequence, and is synthesized by a polarization light combiner and input to the optical fiber.

[0025] The dual-polarized signal light is transmitted through the optical fiber, and the receiver adopts the polarization multiplexing coherent receiving technology to separate the X and Y polarization signals, and uses dispersion compensation, clock recovery, frequency offset compensation, polarization demultiplexing, phase noise compensation and Traditional digital coherent demodulation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a dual-wave transmission system based on implicit conjugation, which hardly changes the hardware structure and digital signal processing process of commonly used optical transmitters, because it is no longer necessary to generate and transmit conjugated dual-wave according to the traditional scheme, It only requires that there are at least two pairs of separable independent signals that meet the orthogonal condition with each other, including orthogonal channels for polarization multiplexing, or multiple subcarriers through multi-carrier modulation (OFDM), or using wavelength division multiplexing technology Different channels of different channels and different time slices of time division multiplexing can be regarded as at least two parallel transmissions, which meet the generalized orthogonality and can meet the requirements of orthogonality in any dimension, such as polarization multiplexing, time division multiplexing, frequency division multiplexing or mode division multiplexing, etc. In the optical receiver, for each independent signal, determine its corresponding one or more orthogonal channels, and restore the conjugated double-wave on this channel, and then perform the coherent addition of the conjugated double-wave to eliminate the first-order Fiber nonlinear effects.

Description

technical field [0001] The technology of the present invention relates to nonlinear optical signal transmission and processing technology. Background technique [0002] Over the past two decades, the transmission capacity of fiber-optic communication systems has experienced three orders of magnitude tremendous growth. In the current high-speed optical fiber communication system, with the completion of the commercial layout of the 100Gb / s system, the next-generation optical fiber transmission single channel begins to develop to 400Gb / s or even 1Tb / s, and the total capacity of a single fiber develops to 100Tb / s to meet the rapid development of data traffic. growing demand. From the perspective of the development of the existing long-distance optical fiber transmission technology, the transmission capacity and the transmission distance are mutually restricted, and there is a theoretical limit to ensuring a sufficient transmission distance while increasing the transmission capa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2543H04B10/61H04J14/06
CPCH04B10/2543H04B10/616H04B10/6162H04B10/6163H04J14/06
Inventor 易兴文黄夏涛宋阳朱明月张静邱昆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com