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1. EP0851251 - Optical switched distributor

Office European Patent Office
Application Number 97310142
Application Date 16.12.1997
Publication Number 0851251
Publication Date 01.07.1998
Publication Kind A2
IPC
G02B 6/28
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
28having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
G02B 6/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
G02B 6/122
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
10of the optical waveguide type
12of the integrated circuit kind
122Basic optical elements, e.g. light-guiding paths
G02B 6/35
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
35having switching means
H01S 3/06
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
H01S 3/07
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
07consisting of a plurality of parts, e.g. segments
CPC
H04Q 11/0001
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
QSELECTING
11Selecting arrangements for multiplex systems
0001using optical switching
Applicants LUCENT TECHNOLOGIES INC
Inventors FATEHI MOHAMMAD T
KNOX WAYNE HARVEY
Designated States
Priority Data 08777894 31.12.1996 US
Title
(DE) Optisch schaltbarer Verteiler
(EN) Optical switched distributor
(FR) Distributeur à commutation optique
Abstract
(EN)
A gain-switched optical distributor, i.e., commutator, is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical distributor of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding amplifier is selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.