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

Method and arrangement for determining the dispersion of an optical transmission link

An optical transmission and line technology, which is used in measurement devices, transmission systems, electromagnetic wave transmission systems, etc.

Inactive Publication Date: 2006-04-12
NOKIA SIEMENS NETWORKS GMBH & CO KG
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage of the described method is that the measurements cannot be performed during data transmission in the optical network
Measurements can only be carried out in a separate optical transmission line with a receiver with network analyzer and additional evaluation unit

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 and arrangement for determining the dispersion of an optical transmission link
  • Method and arrangement for determining the dispersion of an optical transmission link
  • Method and arrangement for determining the dispersion of an optical transmission link

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] in like figure 1 In the optical transmission line schematically shown in , the data signal D to be transmitted i First in the FEC encoder FEC i protected in. Then multiple optical carrier signals in the modulator MO i The coded data signal DS is used within i modulation, and the optical data signal DSO i Compiled into a multiplexed signal DS on the transmit side by the multiplexer MUX S . All optical data signals DS output by the multiplexer MUX S Together, they are modulated (preferably amplitude modulated) in the modulation unit ME to form a sinusoidal interference signal STS. The term "modulation" here is also intended to include the same effect caused by superposition. The signal quality thus deteriorates and the number of bit errors to be corrected by FEC increases. Interfering signal STS not only at frequency f STS and at amplitude A STS above can be changed. The two modulation parameters are adjusted using the system controller S. After passing throu...

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 method and an arrangement for determining the dispersion of an optical transmission link. By determining the signal quality, the bit error rate is measured for a modulated data signal depending on the modulation frequency of a noise signal (STS). The dispersion coefficient of the transmission link is calculated on the basis of the resulting discrete minima of the bit error rates. These measurements can take place advantageously during the operation of the data transmission. The method also provides additional information about the quality of the data transmission by determining the non-linear phase shift.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 and a device according to the preamble of independent claim 9 . Background technique [0002] The effective distance and capacity of optical transmission lines of telecommunications technology are also limited, among other things, by signal distortions due to dispersion in the transmission fibers. Often used standard single-mode fiber (SSMF) has a dispersion coefficient of about 17 ps / (nm*km) in a wavelength window around 1550 nm. With a channel data rate of 2.5 GBit / s, a dispersion-limited regenerator spacing of approximately 1000 km can be achieved without compensation measures. Since the effective distance decreases in inverse proportion to the square of the channel data rate, regenerator distances of approximately 70 km and approximately 3 km respectively result in the case of 10 GBit / s and 40 GBit / s. Therefore, for most 10GBit / s systems and actually all 40GBit / s systems, it i...

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 Applications(China)
IPC IPC(8): G01M11/00H04B10/08
CPCG01M11/338G01M11/335
Inventor E·戈特瓦德
Owner NOKIA SIEMENS NETWORKS GMBH & CO KG
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