Polarisation dispersion compensation device in an optical transmission system

Polarisation dispersion compensation device in an optical transmission system

The device has a polarisation controller (FCP1) and a delay part (DDG1) which introduces a differential delay between two modes of orthogonal polarisation. The controller and the delay part are positioned between the optical fibre (LF) and the receiver terminal (RX). The polarisation controller has...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FRANCIA, CHRISTIAN, BRUYERE, FRANK
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
TRANSMISSION
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Beschreibung
Zusammenfassung:The device has a polarisation controller (FCP1) and a delay part (DDG1) which introduces a differential delay between two modes of orthogonal polarisation. The controller and the delay part are positioned between the optical fibre (LF) and the receiver terminal (RX). The polarisation controller has a feedback control loop (SCU1) consisting of the optical fibre, the polarisation controller and the delay part. The main polarisation state vectors are controlled to ensure they coincide with the state of the polarisation signal vectors at the transmitter terminal output. Ce dispositif comporte un contrôleur de polarisation (FCP1) et un générateur (DDG1) de retard différentiel entre deux modes de polarisation orthogonaux. Ce contrôleur et ce générateur sont intercalés entre la fibre de liaison (LF) et le terminal récepteur (RX). Un dispositif d'asservissement (SCU1) mesure le degré de polarisation (PL) du signal optique restitué par le générateur de retard différentiel, et asservit le contrôleur de polarisation (FPC1) de façon à maximiser le degré de polarisation mesuré (PL). Application aux systèmes de transmission optique à grande distance.