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1. (WO1992010770) A METHOD AND ARRANGEMENT FOR OPTICAL SWITCHING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010770 International Application No.: PCT/SE1991/000787
Publication Date: 25.06.1992 International Filing Date: 20.11.1991
Chapter 2 Demand Filed: 01.07.1992
IPC:
H04Q 11/00 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
Q
SELECTING
11
Selecting arrangements for multiplex systems
Applicants:
TELEFONAKTIEBOLAGET LM ERICSSON [SE/SE]; S-126 25 Stockholm, SE
Inventors:
JOHANSSON, Sonny; SE
Agent:
BJELLMAN, Lennart ; Dr Ludwig Brann Patentbyrå AB P.O. Box 1344 S-751 43 Uppsala, SE
Priority Data:
9003914-007.12.1990SE
Title (EN) A METHOD AND ARRANGEMENT FOR OPTICAL SWITCHING
(FR) PROCEDE ET DISPOSITIF DE COMMUTATION OPTIQUE
Abstract:
(EN) The present invention relates to an optical switch (30) by means of which wavelength multiplexed optical signals ($g(l)1-$g(l)n) can be switched in an optically uninterrupted fashion through the switch. The switch is transparent to the bit rate and code format of the optical signals and comprises groups of a number (n) of tunable optical wavelength filters (39A1-39An...39n1-39nN), preferably tunable laser amplifiers. Control means (40) control the setting of the tunable wavelength filters as well as the settings of optical switching elements (45A-45N) so as to prevent two identical wavelengths from appearing simultaneously at the input and output links.
(FR) Cette invention concerne un commutateur optique (30) à l'aide duquel on peut commuter selon un mode optiquement continu des signaux ($g(l)1, $g(l)n) optiques de longueur d'ondes multiplexées. Le commutateur est transparent au débit binaire et au format de code des signaux optiques et comprend des groupes formés de plusieurs (n) filtres de longueurs d'ondes accordables (39A1-39An...39n1-39nN), de préférence des amplificateurs laser accordables. Un système de commande (40) commande la mise au point des filtres de longueurs d'ondes accordables ainsi que les réglages des éléments de commutation optique (45A-45N) de manière à empêcher deux longueurs d'ondes identiques d'apparaître simultanément au niveau des circuits d'entrée et de sortie.
Designated States: CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0560824US5450224JP3164369JPH06503432CA2096965DE000069131668