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Dispersion management system for soliton optical transmission system

一种光通信系统、色散的技术，应用在光通信领域，能够解决程均色散值低等问题

Inactive Publication Date: 2005-06-08
KEOPALIS CAPITAL L L C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, at any point, the local dispersion value is high, but the average dispersion value is low

Method used

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  • Dispersion management system for soliton optical transmission system
  • Dispersion management system for soliton optical transmission system
  • Dispersion management system for soliton optical transmission system

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Embodiment Construction

[0012] Our work is based on using figure 1 The dispersion map shown is based on the numerical integration of the nonlinear Schrödinger equation (NLS). Figure 5 A general system arrangement is given, which includes a transmitter T and a receiver R connected by an optical fiber of length L. The fibre is divided into a number of units 1, each unit containing a separate segment N of fibre with normal dispersion and segment A of fibre with anomalous dispersion. In a particular embodiment the segments are of equal length, even though the start and end of the dispersion compensating element are chosen at the midpoint of an optical fiber. In the special case mentioned, each fiber is 100km long and the range-average dispersion is -0.1ps 2 / km. The nonlinear coefficient is taken as 2.65rad / W / km. To simplify the problem we have chosen to ignore losses and higher order dispersion.

[0013] We have shown that a quasi-steady soliton or solitary wave solution exists for this dispersive...

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Abstract

The dispersion management system of the soliton or soliton-like transmission system includes a length (L) of optical fiber, which is composed of many segments (1) of optical fibers (N, A) with opposite dispersion signs connected together. The duration of the dispersion-compensated state is short compared to the propagation interval of the rest of the system, and the overall process-averaged dispersion is anomalous.

Description

technical field [0001] The present invention relates to optical communication, in particular to an optical communication system using soliton or soliton-like pulses to transmit information. Background technique [0002] It has recently been reported that soliton transmission in a system where the dispersion along the entire fiber is not always anomalous, but is periodically compensated for with an anti-sign (normal) dispersion fiber, results from laboratory demonstrations. In this way, the 20Gb / s signal can be transmitted over 9000km in the recirculating loop, and up to 8100km in the straight-line transmission experiment. This result greatly exceeds the transmission distance previously achieved without the use of soliton control techniques such as sliding filters and synchronous modulators. Although it is clear that the use of dispersion management in solitary systems can be of great benefit, to date there has been little theoretical explanation for the mechanism of this im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/34H04B10/2507H04B10/2525
CPCG02B6/29376G02B6/29394H04B10/25077H04B10/25253
Inventor N·J·多兰N·J·史密斯
Owner KEOPALIS CAPITAL L L C