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1. WO2017205442 - OPTICAL COMMUNICATIONS SYSTEM PHASE-CONTROLLED TRANSMITTER AND PHASE-CONJUGATE MIRROR RECEIVER

Publication Number WO/2017/205442
Publication Date 30.11.2017
International Application No. PCT/US2017/034114
International Filing Date 24.05.2017
IPC
H04B 10/112 2013.01
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
11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
112Line-of-sight transmission over an extended range
CPC
H01Q 3/2676
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
3Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
26varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
2676Optically controlled phased array
H04B 10/071
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
07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
071using a reflected signal, e.g. using optical time-domain reflectometers [OTDRs]
H04B 10/1123
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
11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
112Line-of-sight transmission over an extended range
1123Bidirectional transmission
H04B 10/1129
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
11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
112Line-of-sight transmission over an extended range
1129Arrangements for outdoor wireless networking of information
H04B 7/18504
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
18502Airborne stations
18504Aircraft used as relay or high altitude atmospheric platform
H04J 14/08
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
08Time-division multiplex systems
Applicants
  • THE CHARLES STARK DRAPER LABORATORY, INC. [US]/[US]
Inventors
  • DAWSON, Robin Mark Adrian
  • LAINE, Juha Pekka
  • SPECTOR, Steven
  • CHAPARALA, Murali
Agents
  • HOUSTON, J. Grant
Priority Data
62/340,58224.05.2016US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL COMMUNICATIONS SYSTEM PHASE-CONTROLLED TRANSMITTER AND PHASE-CONJUGATE MIRROR RECEIVER
(FR) ÉMETTEUR À COMMANDE DE PHASE ET RÉCEPTEUR À MIROIR À CONJUGAISON DE PHASE POUR SYSTÈME DE COMMUNICATION OPTIQUE
Abstract
(EN)
An optical communications system comprises a first node comprising a phased array transmitter for generating an optical beam and a receiver, and a second node comprising a phase conjugate mirror for returning the optical beam to be detected by the receiver of the first node. The phased array transmitters allow for electronic steering of the beams in a way that is much faster and with a potentially smaller physical footprint than the mechanical systems. The phase conjugate mirrors return the received beams of photons back over the exact path they were sent from the phased array transmitters, ensuring continuity of communication even in the presence of atmospheric turbulence.
(FR)
Cette invention concerne un système de communication optique comprenant un premier nœud comprenant un réseau d'émetteurs à déphasage pour générer un faisceau optique et un récepteur, et un second nœud comprenant un miroir à conjugaison de phase pour renvoyer le faisceau optique à détecter par le récepteur du premier nœud. Les émetteurs à déphasage en réseau permettent de diriger électroniquement les faisceaux d'une manière beaucoup plus rapide et avec une empreinte physique potentiellement plus petite que les systèmes mécaniques. Les miroirs à conjugaison de phase renvoient les faisceaux de photons reçus sur le trajet exact sur lequel ils ont été émis par les émetteurs à déphasage en réseau, assurant la continuité de la communication même en la présence de turbulences atmosphériques.
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