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1. (WO1991009475) LOSSLESS OPTICAL COMPONENT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/009475 International Application No.: PCT/GB1990/001950
Publication Date: 27.06.1991 International Filing Date: 14.12.1990
Chapter 2 Demand Filed: 21.06.1991
IPC:
G02F 1/35 (2006.01) ,H01S 3/06 (2006.01) ,H01S 3/094 (2006.01) ,H01S 3/10 (2006.01) ,H04B 10/291 (2013.01)
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35
Non-linear optics
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
05
Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06
Construction or shape of active medium
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
09
Processes or apparatus for excitation, e.g. pumping
091
using optical pumping
094
by coherent light
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
10
Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29
Repeaters
291
in which processing or amplification is carried out without conversion of the main signal from optical form
Applicants:
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY [GB/GB]; 81 Newgate Street London EC1A 7AJ, GB (AllExceptUS)
HORNUNG, Stephen [GB/GB]; GB (UsOnly)
ROWE, Christopher, John [GB/GB]; GB (UsOnly)
Inventors:
HORNUNG, Stephen; GB
ROWE, Christopher, John; GB
Agent:
PRATT, David, Martin; British Telecommunications public limited company Intellectual Property Unit 151 Gower Street London WC1E 6BA, GB
Priority Data:
8928237.014.12.1989GB
Title (EN) LOSSLESS OPTICAL COMPONENT
(FR) COMPOSANT OPTIQUE SANS PERTE
Abstract:
(EN) A lossless optical component (2) includes having an input and at least one output. The optical component (2) comprises an operational portion (2b) and an amplifier portion (2a) upstream of the operational portion. The amplifier portion (2a) includes an optical amplifier (6) for amplifying optical signals received by the input. The optical amplifier (6) is provided with input optical wave guiding means (8) via which the optical amplifier is optically pumpable by a remote pump laser (8). The output of the optical amplifier (6) is proportional to the loss of the operating portion (2b) of the optical component (2).
(FR) Composant optique sans perte (2) composé d'une entrée et d'au moins une sortie. Il comprend une partie opérationnelle (2b) et une partie amplificatrice (2a) placée en amont de la première. La partie amplificatrice (2a) inclut un amplificateur optique (6) qui amplifie les signaux optiques reçus par l'arrivée. Il est muni d'un système (8) de guidage de l'onde optique d'arrivée via lequel il peut être pompé optiquement par un laser de pompage commandé à distance (8). La sortie de l'amplificateur optique (6) est proportionnelle à la perte de la partie opérationnelle (2b) du composant optique (2).
Designated States: AU, CA, JP, US
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:
ES2074259EP0506753US5323474JPH05502334CA2071861DE000069020362
AU1991070340