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1. WO2001061385 - COMPENSATING POLARIZATION MODE DISPERSION IN FIBER OPTIC TRANSMISSION SYSTEMS

Publication Number WO/2001/061385
Publication Date 23.08.2001
International Application No. PCT/US2001/040133
International Filing Date 16.02.2001
Chapter 2 Demand Filed 17.09.2001
IPC
G02B 6/34 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24Coupling light guides
26Optical coupling means
34utilising prism or grating
H04B 10/18 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
12Transmission through light guides, e.g. optical fibres
18Arrangements for reducing or eliminating distortion or dispersion, e.g. equalisers
CPC
G02B 6/278
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
27with polarisation selective and adjusting means
2753characterised by their function or use, i.e. of the complete device
278Controlling polarisation mode dispersion [PMD], e.g. PMD compensation or emulation
H04B 10/2569
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25Arrangements specific to fibre transmission
2507for the reduction or elimination of distortion or dispersion
2569due to polarisation mode dispersion [PMD]
Applicants
  • MASSACHUSETTS INSTITUTE OF TECHNOLOGY [US]/[US]
  • CHOU, Patrick, C. [US]/[US]
  • HAUS, Hermann, A. [US]/[US]
  • FINI, John, M. [US]/[US]
Inventors
  • CHOU, Patrick, C.
  • HAUS, Hermann, A.
  • FINI, John, M.
Agents
  • PRAHL, Eric, L.
Priority Data
09/505,31316.02.2000US
60/243,52223.10.2000US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) COMPENSATING POLARIZATION MODE DISPERSION IN FIBER OPTIC TRANSMISSION SYSTEMS
(FR) PROCEDE ET DISPOSITIF POUR COMPENSER LA DISPERSION DE POLARISATION DE MODE DANS DES SYSTEMES DE TRANSMISSION A FIBRES OPTIQUES
Abstract
(EN) A real-time optical compensating apparatus reduces the PMD in an optical fiber by determining the principal states of polarization of the optical fiber and delaying one principal state of polarization with respect to the other. The invention features, an optical compensating apparatus for reducing PMD in an optical signal transmitted through an optical medium. The optical compensating apparatus includes a polarization controller configured to receive an optical signal propagating through the optical medium and a magnitude of time delay between the principal states of polyrization; and a delay controller arranged in an optical path of the medium after the polarization controller and configured to receive the transformed optical signal, wherein the polarization controller transforms the optical signal based on the principal states of polarization and the delay controller compensates PMD of the optical signal by reducing the time delay between the principal states of polarization based on the magnitude of time delay.
(FR) Selon l'invention, un appareil de compensation optique en temps réel réduit la dispersion de polarisation de mode de la fibre optique en déterminant les états principaux de polarisation de la fibre optique et en décalant dans le temps un état principal de polarisation par rapport à un autre.
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