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

Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system

A detection mode and division multiplexing technology, which is applied in the field of communication, can solve problems such as carrier channel crosstalk, achieve good bit error performance, increase transmission distance, and reduce mode selection sensitivity.

Active Publication Date: 2018-01-26
JILIN UNIV
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of carrier channel crosstalk in the existing MDM-SHD system, the present invention proposes a self-homodyne detection mode division multiplexing (DSB-MDM-SHD) system scheme based on carrier channel double sideband modulation

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
  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system
  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system
  • Method for eliminating carrier channel crosstalk in self zero difference detection modular division multiplexing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The method proposed in the present invention is simulated and verified by using a 4×4 self-homodyne detection mode division multiplexing (MDM-SHD) system. figure 1 It is a schematic structural diagram of the 4 × 4 self-homodyne detection mode division multiplexing (DSB-MDM-SHD) system based on carrier-channel double-sideband modulation adopted by the present invention, and its composition includes: 1 center frequency is 193.1THz (center wavelength is 1552.5nm) DFB laser source module with a line width of 1MHz and an average output power of 3mw; two 56Gb / s PDM-QPSK signal transmitter modules; a 1:3 and a 1:2 power beam splitter module; two A 14GHz sinusoidal signal source and two Mach-Zehnder intensity modulator (MZ) modules, the drive current is 0.8A, the bias current is 0A; a pair of mode multiplexer / demultiplexer modules, the mode selection sensitivity can be Controlled according to the mode coupling matrix, the default coupling strength introduced is -25dB; two lengt...

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 invention discloses a method for eliminating the carrier channel crosstalk in a self zero difference detection modular division multiplexing system, and belongs to the technical field of communication. According to the method, the influence of coherent beat frequency noise caused by the crosstalk of a signal path of a carrier channel in a few mode optical fiber transmission process by using the method of performing double-sideband modulation on a transmitting end and performing down-conversion restoration on a receiving end by using carrier channel pilot frequency light. By adoption of themethod, the transmission distance of the self zero difference detection modular division multiplexing (MDM-SHD) system is increased without changing the existing few mode optical fiber (FMF) parameter, the requirements of the MDM-SHD system on the mode selection sensitivity of the mode multiplexer / demultiplexer are reduced, meanwhile better BER performance can be guaranteed, and the performanceeffect is good.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for eliminating carrier crosstalk in a mode division multiplexing (MDM-SHD) communication system based on self-homodyne detection. Background technique [0002] In recent years, with the application and development of mobile Internet, cloud computing, and Internet of Things technologies, data services have shown an explosive growth trend. Among them, medium and short-distance optical communication represented by optical access network and data center optical interconnection urgently needs to increase network broadband capacity. At present, the intensity modulation-direct detection (IM / DD) method is widely used in short-distance optical communication. This method can only use the light intensity information, resulting in the loss of phase information and the waste of spectrum resources. Moreover, IM / DD is affected by dispersion and The influence of nonl...

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
IPC IPC(8): H04J11/00H04B10/61
Inventor 胡贵军郭盟郝海洋段净化李娇刘云鹤黄成斌陈翠光
Owner JILIN UNIV
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