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All-optical converter

A converter and optical technology, applied in the direction of optical non-return-to-zero to return-to-zero conversion, electromagnetic transmitters, electrical components, etc., can solve the problems of high cost and no converters with frequencies exceeding 40G Hz

Active Publication Date: 2010-02-10
FRANCE TELECOM SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Converters containing electronic and optical components are very costly for frequencies above 20G Hz and no converters are available for frequencies above 40G Hz
[0009] So the problem is to make an all-optical converter that converts an intensity modulated optical signal to a DPSK format modulated optical signal

Method used

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Examples

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Embodiment Construction

[0028] The converter 10 comprises a first input terminal 152a, to which the first optical signal 12 is input. The optical signal represents the data sequence and is modulated in intensity according to the OOK format. The optical signal has been generated from the electrical signal and the optoelectronic modulator, which converts the OOK modulated electrical signal into an OOK modulated optical signal.

[0029] The converter 10 comprises a second input 162e to which is input an optical carrier 16 (continuous or discontinuous) which will then be modulated into DPSK format.

[0030] The converter 10 comprises a first output 162c on which the optical signal 14 modulated in DPSK format is transmitted.

[0031] The converter 10 thus performs an all-optical conversion of an intensity-modulated optical signal into an optical signal modulated in DPSK format.

[0032] The converter 10 comprises a differential encoding module 100 and means 200 suitable for modulation.

[0033] The dev...

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PUM

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Abstract

The invention relates to an all-optical converter for converting an intensity modulated optical signal into an optical DPSK modulated signal comprising a first input for a first intensity modulated optical signal, a differential encoding module for carrying out a differential encoding between the first signal and a second optical signal synchronous therewith, a device for modulating the phase of an optical signal according to the differential encoding which is carried out by the differential encoding module and the output of the modulating device delivering the optical DPSK modulated signal.

Description

technical field [0001] The invention relates to an all-optical converter for converting intensity-modulated optical signals into optical signals modulated in DPSK format. It finds application in the field of optical transmission. Background technique [0002] Intensity modulation by on / off keying or OOK is well known. In this method, a pulse represents a "1" and no pulse represents a "0". [0003] Differential phase shift modulation (differential phase shift keying or DPSK) is well known. In the DPSK format, information is transmitted in the phase difference between two adjacent pulses. [0004] Transmission in DPSK format is advantageous because of higher sensitivity. Furthermore, it is easy to analyze the phase difference between the two signals in optical mode. [0005] In the field of optical transmission, existing converters convert amplitude-encoded binary electrical signals into DPSK-encoded optical signals. The converter combines electronics and optics. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/155H04B10/50H04B10/516H04B10/556
CPCH04B10/505H04B10/5561H04B10/516H04B10/5055H04B2210/517
Inventor 邦雅曼·屈埃诺埃丝特·勒鲁齐克尼古拉·布罗希耶
Owner FRANCE TELECOM SA
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