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

Optical amplifier and optical fiber

An optical amplifier and optical amplification technology, applied in lasers, laser parts, multi-level optical transmission, etc., can solve the problem of inability to effectively suppress four-wave mixing

Inactive Publication Date: 2006-12-27
FUJITSU LTD
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Four-wave mixing tends to occur frequently especially in EDF used in transmission technologies such as WDM where multiple wavelengths are multiplexed
It can be recognized that even using EDF with negative dispersion in WDM transmission cannot effectively suppress four-wave mixing

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
  • Optical amplifier and optical fiber
  • Optical amplifier and optical fiber
  • Optical amplifier and optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0072] Embodiments of the present invention will be described below with reference to the drawings. figure 1 is a view for explaining the principle of the optical amplifier according to the present invention. The optical amplifier 10 includes an optical fiber 11, an excitation part 12 and a multiplexing part 13, and amplifies an optical signal.

[0073] The optical fiber 11 is an optical amplifying medium having positive dispersion in a signal band including signal light to be propagated, and amplifying a wavelength division multiplexed (WDM) signal including a plurality of wavelengths. The excitation unit 12 inputs excitation light to the optical fiber 11 .

[0074] The multiplexing unit 13 combines the WDM signal light and excitation light. The multiplexed signal is input to the optical fiber 11 . The WDM signal light is amplified by the excitation light in the optical fiber 11 and output from the optical fiber 11 . The optical fiber 11 has positive dispersion, so the o...

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

An optical amplifier that improves the quality of WDM transmission by reducing four-wave mixing. An optical fiber has positive chromatic dispersion in a signal band and is used as an optical amplification medium for amplifying a wavelength division multiplex signal. An excitation section inputs excitation light to the optical fiber. In order to actualize mismatching of phases of optical signals with different wavelengths to be propagated, the optical fiber has positive chromatic dispersion in a signal band by which there is a great difference between a signal frequency, being a frequency of a signal to be amplified, and a zero-dispersion frequency, being a frequency at which chromatic dispersion is zero. As a result, the optical fiber functions as an optical amplification medium in which four-wave mixing is suppressed.

Description

technical field [0001] The present invention relates to optical amplifiers and optical fibers, and more particularly to an optical amplifier for amplifying optical signals, and an optical fiber used as an optical amplification medium for amplifying optical signals. Background technique [0002] It is hoped that more advanced services can be provided through optical communication networks. Wavelength Division Multiplexing (WDM) is widely used as an optical transmission technology. WDM multiplexes multiple optical signals with different wavelengths into a single optical fiber. [0003] With WDM, by utilizing the broadband amplification characteristics of optical amplifiers, wavelength-division multiplexing signals containing multiple wavelengths are amplified and transmitted in long-distance trunk lines, and, for example, metropolitan ring networks are constructed in cities through their wavelength routing functions. [0004] There are many types of optical amplifiers. For ...

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): H01S3/10H01S3/067H04J14/02
CPCH01S3/06758H04B10/291H01S3/09415H04B2210/003H04B2210/256H01S2301/04H01S3/06725H01S3/06729H01S3/094011H01S3/06754H01S3/0064
Inventor 宿南宣文稻垣真也
Owner FUJITSU LTD
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