Polarization multiplexing and non-polarization multiplexing optical signal recognition method and system

A technology for signal identification and multiplexing light, applied in transmission monitoring/testing/fault measurement systems, optical fiber transmission, eliminating distortion/dispersion, etc. , easy to use, wide range of effects

Inactive Publication Date: 2016-12-07
HUAZHONG UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a polarization multiplexing and non-polarization multiplexing optical signal identification method and system, which overcomes the defects of complex system structure, high cost, large volume and high power consumption in the prior art

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
  • Polarization multiplexing and non-polarization multiplexing optical signal recognition method and system
  • Polarization multiplexing and non-polarization multiplexing optical signal recognition method and system
  • Polarization multiplexing and non-polarization multiplexing optical signal recognition method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] like figure 1 The modulation format identification system shown includes: an optical filter 1 , a dispersion module 2 , a high-speed optical detector 3 , a sampler and an analog-to-digital converter 4 , and a DSP module 5 . Combine below figure 1 Further describe the modulation format identification workflow of this specific embodiment as follows:

[0025] Step 1. Firstly, the channel to be identified is extracted through an optical filter, and other signals and noises are filtered out.

[0026] Step 2, judging whether the dispersion value of the optical signal of the channel to be identified reaches the set dispersion value, if not, the extracted optical signal to be identified first enters the dispersion module, and the dispersion module applies the set dispersion value to the optical signal, if If yes, go directly to the next step.

[0027] Step 3. Acquiring the time-domain digital sampling values ​​of the above-mentioned optical signals, performing normalization ...

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 relates to a polarization multiplexing and non-polarization multiplexing optical signal identification method and system in the field of optical fiber communication. The system includes an optical filter, a dispersion module, a high-speed photodetector, a sampler, an analog-to-digital converter and a digital signal processing module. The identification method includes the steps of: extracting the channel to be identified, applying a set dispersion to the signal to be identified, obtaining the time-domain digital sampling value of the signal, performing normalization processing, calculating the power distribution histogram of the output signal, and finding the maximum value of the histogram For the corresponding abscissa, the polarization multiplexed signal and the non-polarization multiplexed optical signal are identified according to the relative size of the maximum abscissa and the decision threshold. The present invention is applicable to signals of various rates and modulation formats, has a wide operating band, and has a large tolerance for signal quality degradation caused by optical fiber dispersion, polarization mode dispersion and amplifier noise in signal transmission, and has simple structure, high cost performance, and wide application range Wide and easy to use advantages.

Description

technical field [0001] The invention relates to the technical fields of optical fiber communication, signal identification and digital signal processing, in particular to polarization multiplexing and non-polarization multiplexing signal identification and a system. Background technique [0002] Compared with the previous single-polarization optical fiber communication system, the polarization multiplexing technology can double the transmission capacity of the system, but the signal processing and signal detection methods are very different from the single-polarization and polarization-multiplexed signals. Therefore, in the signal processing Two different types of optical signals need to be accurately identified when receiving and receiving. In the past, in order to distinguish two kinds of signals, it is generally realized by using the characteristic that the degree of polarization (DOP) of the single polarization signal is close to 1 and the DOP of the polarization multipl...

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): H04B10/2513H04B10/07
Inventor 崔晟何晟
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap