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

Ultra-precise time-frequency transfer method for dwdm optical transmission system

A technology of time-frequency transmission and optical transmission, which is applied in wavelength division multiplexing system, time division multiplexing system, multiplexing communication, etc. Problems such as improvement and time synchronization cannot be solved

Active Publication Date: 2016-09-21
四川泰富地面北斗科技股份有限公司
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned insurmountable technical bottleneck causes the change value of the optical fiber delay of the existing SDH and PTN communication networks to be unable to be adaptively controlled, and the defects of the original time synchronization technology make it impossible to improve the synchronization accuracy, especially when dense wavelength division multiplexing When (DWDM) technology is applied in the optical fiber communication system, the problem of high-precision time synchronization cannot be solved

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
  • Ultra-precise time-frequency transfer method for dwdm optical transmission system
  • Ultra-precise time-frequency transfer method for dwdm optical transmission system
  • Ultra-precise time-frequency transfer method for dwdm optical transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: see figure 1 , an ultra-precise time-frequency transfer method suitable for DWDM optical transmission systems, the specific implementation methods and steps are as follows:

[0027] a. Firstly, aiming at dense wavelength division multiplexing DWDM optical transmission system, establish the mathematical model of ultra-precision optical fiber timing system:

[0028] E s = E o + Δf F o + 1 2 at 2 + ΔT xy ( t ) + ΔT l ( t ) + ΔT λi ( t ) + φ ...

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 an ultra-precise time-frequency transfer method suitable for a DWDM optical transmission system. The steps of the method are as follows: a. First establish a mathematical model of an ultra-precise optical fiber timing system; b. Fully realize high-precision time and frequency synchronization; c. Then use the fiber delay online monitoring technology to accurately measure the delay value of each fiber in the DWDM cable; d. The value is compensated to <0.1ns; e. Using fiber delay online monitoring technology and fiber delay automatic locking and equalization compensation technology to split and strip the negative effects of fiber delay drift and aging accumulation. Compared with the prior art, the present invention solves the problem that the change value of the optical fiber time delay in the optical communication network such as the existing optical synchronous digital system and the packet transmission network cannot be adaptively controlled, and the defects of the original time synchronization technology make it difficult to improve the synchronization accuracy. question.

Description

technical field [0001] The invention relates to the fields of ultra-precise time-frequency synchronization technology and optical fiber communication technology, in particular to an ultra-precise time-frequency transfer method suitable for a DWDM optical transmission system. Background technique [0002] At present, Optical Synchronous Digital Hierarchy (SDH) and Packet Transport Network (PTN), as the main transport network, occupy a large proportion in my country's communication, electric power and national defense industries. With the development of optical communication systems towards higher speed and larger capacity, and the application of technologies such as Erbium-doped Fiber Amplifier (EDFA) and Dense Wavelength Division Multiplexing (DWDM) in optical fiber communication systems, the speed and capacity of optical fiber communication systems have been doubled in size. However, in the currently operating time-frequency synchronization network, it is difficult to achi...

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): H04J3/06H04J3/16H04J14/02
Inventor 李有生李忠文孟志才李高峰李琦彭良福
Owner 四川泰富地面北斗科技股份有限公司
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