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1. WO2002001773 - CHANNEL MULTIPLEXER AND DEMULTIPLEXER FOR OPTICAL COMMUNICATIONS

Publication Number WO/2002/001773
Publication Date 03.01.2002
International Application No. PCT/US2001/020321
International Filing Date 25.06.2001
Chapter 2 Demand Filed 22.01.2002
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
CPC
G02B 6/272
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
27with polarisation selective and adjusting means
2706as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
2713cascade of polarisation selective or adjusting operations
272comprising polarisation means for beam splitting and combining
G02B 6/2766
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
2766Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
G02B 6/2773
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
2773Polarisation splitting or combining
G02B 6/29302
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
28having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
293with wavelength selective means
29302based on birefringence or polarisation, e.g. wavelength dependent birefringence, polarisation interferometers
G02B 6/29386
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
28having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
293with wavelength selective means
29379characterised by the function or use of the complete device
2938for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
29386Interleaving or deinterleaving, i.e. separating or mixing subsets of optical signals, e.g. combining even and odd channels into a single optical signal
Applicants
  • CIRVINE CORPORATION [US]/[US] (AllExceptUS)
  • ZHAO, Bin [US]/[US] (UsOnly)
Inventors
  • ZHAO, Bin
Agents
  • CARTE, Norman, E.
Priority Data
09/891,79425.06.2001US
09/891,79525.06.2001US
09/892,22425.06.2001US
60/213,37023.06.2000US
60/213,37123.06.2000US
60/244,61401.11.2000US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) CHANNEL MULTIPLEXER AND DEMULTIPLEXER FOR OPTICAL COMMUNICATIONS
(FR) MULTIPLEXEUR-DEMULTIPLEXEUR CANAL POUR COMMUNICATIONS OPTIQUES
Abstract
(EN) A low dispersion comb filter or interleaver comprises a first birefringent element assembly (3) having at least one birefringent element (4-6) and a second birefringent element assembly (10) having at least one other birefringent element (11-13). The first birefringent element assembly and the second birefringent element assembly are configured so as to cooperate with one another in a manner which mitigates dispersion of the interleaver. By aligning the polarization directions of the odd channels and the even channels so as to be parallel with respect to another prior to entering the second birefringent element assembly, zero or nearly zero dispersion is obtained simultaneously for both the odd and even channels.
(FR) La présente invention concerne un filtre en peigne ou imbricateur à faible niveau de dispersion, comprenant un premier ensemble d'éléments biréfringents comportant au moins un élément biréfringent, et un second ensemble d'éléments biréfringents comportant au moins un autre élément biréfringent. De par leur configuration, les deux ensembles d'éléments biréfringents coopèrent entre eux de façon à atténuer la dispersion de l'imbricateur. Pour réaliser une dispersion presque ou totalement nulle simultanément pour les canaux pairs et impairs, on oriente les axes de polarisation des canaux pairs et impairs de façon qu'ils soient parallèles entre eux avant l'entrée dans le second ensemble d'éléments biréfringents.
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