TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A technology that uses light propagating in free space to transmit data between two points.  7, record 1, English, - free%2Dspace%20optics

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Free-Space Optics (also known as FSO, Wireless Optics or Optical Wireless) is an optical data, voice and video transmission system. Like fiber optic cable, wireless optics communication systems use laser light to transmit a digital signal between two transceivers. However, unlike fiber, the laser like is transtmited through the air (free-space) instead of through a glass strand. In order for the digital signal to be transmitted and received, there must be clear line of site between each wireless optics unit. In other words, there should be no obstructions such as trees or buildings between the transceiver units.  1, record 1, English, - free%2Dspace%20optics

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The technology is useful where the physical connection of the transmit and receive locations is difficult, for example in cities where the laying of fibre optic cables is expensive. Free Space Optics is also used to communicate between space-craft, since outside of the atmosphere there is little to distort the signal. The optical links usually use infrared laser light, although low-data-rate communication over short distances is possible using LEDs [Light Emitting Diode]. IrDA [Infrared Data Association] is a very simple form of free-space optical communications. Distances up to the order of 10 km are possible, but the distance and data rate of connection is highly dependent on atmospheric conditions.  7, record 1, English, - free%2Dspace%20optics

Record number: 1, Textual support number: 1 OBS

In Information Technology and Communications, IrDA refers to Infrared Data Association, a standard for communication between devices (such as computers, PDAs and mobile phones) over short distances using infrared signals.  8, record 1, English, - free%2Dspace%20optics

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

L'optique sans fil et la radio sont deux technologies foncièrement différentes qui ont longtemps été considérées comme concurrentes. [...] Avec l'optique sans fil, on obtient de très hauts débits garantis jusqu'à 10 Gb [gigabits] se propageant sur de courtes ou de moyennes distances (entre 100 m et 2 km), en «full duplex».  1, record 1, French, - optique%20sans%20fil

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

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These days, of course, not all aircraft need a pilot. This is an unmanned aerial vehicle called Orka, from the defense arm of European aerospace giant EADS. Onboard gear for the vertical-takeoff-and-landing drone could include day/night video cameras, laser sensors, electronic eavesdropping payloads or communications relay devices, the company says.  1, record 2, English, - vertical%2Dtakeoff%2Dand%2Dlanding%20drone

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Au total, le Pentagone a décidé de consacrer un budget de 1 Md$ [...] sur 20 ans pour doter l'US Navy d'un drone d'observation VTOL (atterrissage et décollage verticaux). Le véhicule doit décoller verticalement par ses propres moyens depuis une plate-forme de faibles dimensions, parcourir 200 km pour rejoindre sa zone de travail à 280 km/h et y patrouiller pendant trois heures à 6 000m avant de retourner à sa base où il dedra apponter automatiquement. Pour corser le tout, il devra emporter une charge utile de 100 kg, tandis que son réservoir sera rempli avec un carburant peu volatil, compatible avec les normes de sécurité en vigueur au sein de l'US Marines Corps et de l'US Navy.  1, record 2, French, - drone%20d%27observation%20VTOL

Record number: 2, Textual support number: 1 PHR

Drone VTOL interarmées.  3, record 2, French, - drone%20d%27observation%20VTOL

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 OBS

[The optical transmission project]... combines into optical communications systems the results from the semiconductor laser and optical fibre projects and those from the digital transmission programme. The first of these systems will be the ELO-34, an optical line system that will operate with the MCP-480(3rd order PGM multiplex).  3, record 3, English, - optical%20line%20system

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

[le projet de transmission optique] [...] associe dans des systèmes de télécommunications optiques des résultats obtenus grâce aux deux autres projets optiques et ceux découlant du programme de transmission numérique. Le premier de ces systèmes qui sera réalisé est le système ELO-34. Il s'agit d'un système à lignes optiques qui fonctionnera avec le système MCP-480 (système de multiplexage MIC du 3e ordre).  2, record 3, French, - syst%C3%A8me%20%C3%A0%20lignes%20optiques

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

High data rate intersatellite communications will be needed in applications such as short range links between clusters of satellites in one or adjacent orbital slots, medium range links forming a network in LEO (Low Earth Orbit) and MEO (Medium Earth Orbit) constellations, and longer links between GEO (Geostationary Orbit) satellites. This requires optical intersatellite links or satellite to ground communications links with digital data transfer at 10 Gbps at ranges of 10 000 kilometres.  2, record 4, English, - optical%20intersatellite%20link

Record number: 4, Textual support number: 1 OBS

Optical intersatellite links offer higher data rates than microwave alternatives. There is no requirement for spectrum approval and interference threats are minimal with laser communications.  2, record 4, English, - optical%20intersatellite%20link

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

Les liaisons optiques intersatellites offrent un débit binaire plus élevé que les liaisons hyperfréquences, aucune approbation de spectre n'est nécessaire et les risques de brouillage sont minimes.  5, record 4, French, - liaison%20optique%20intersatellite

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

NASDA will conduct a series of experiments with optical inter-orbit communications, in cooperation with the European Space Agency(ESA), using ESA's geostationary satellite, the Advanced Relay and Technology Mission Satellite(ARTEMIS). A high-power laser device, a high-gain optical antenna, and a highly sensitive signal detector are required for this experiment since the distance between OICETS and ARTEMIS is estimated to be up to 45, 000 kilometers.  2, record 5, English, - advanced%20relay%20and%20technology%20mission%20satellite

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

Artemis est le dernier satellite de télécommunications mis au point par l'ESA et sa conception innovatrice fait appel à de nouvelles technologies jamais utilisées auparavant dans un satellite de télécommunications. En plus d'améliorer les communications mobiles et les retransmissions de données entre satellites, Artemis jouera un rôle important dans le développement de Galileo, le nouveau système européen de navigation satellitaire à l'échelle mondiale, en apportant une contribution précieuse pour faire progresser les télécommunications mobiles et les systèmes de navigation durant son séjour prévu de dix ans en orbite.  1, record 5, French, - satellite%20Artemis

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

The heterostructure laser. Heterostructures have been crucially important for the development of semiconductor lasers.... Alferov was the first to succeed in producing a lattice-adapted heterostructure(AIGaAs/GaAs, 1969) with clear borders between the layers. Alferov's research team succeeded in rapidly developing many types of components built up of heterostructures, including the injection laser which Alferov patented in 1963. A technological breakthrough occurred around 1970 when heterostructure lasers became able to work continuously at room temperatures. These properties have, for example, made fibre-optic communications practically possible.  2, record 6, English, - heterostructure

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

[...] la durée de vie utile d'un laser à semi-conducteur est plus longue quand on limite la quantité d'électricité qui le traverse. Il existe plusieurs façons de limiter le courant électrique. On peut, par exemple, introduire d'autres éléments chimiques dans le cristal, de sorte que la couche active du laser soit située entre des matériaux dont la bande interdite est particulièrement large. On obtient ainsi une "hétérostructure" dont les barrières d'énergie internes empêchent la diffusion des porteurs de charge hors de la région active. (Pour la science, janvier 1985).  1, record 6, French, - h%C3%A9t%C3%A9rostructure

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

lightwave communications technology : three primary components make up any lightwave communications system. On the transmitting end, a laser, or light-emitting diode; on the receive end, a highly sensitive photodetector; and in the middle, supertransparent gloss fibers we call lightguides.  1, record 7, English, - lightwave%20communications%20technology

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  French

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Record 11,  Textual support,  French

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Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 OBS

A system for transmitting coherent beams of flight which may form high capacity communications links in the future.  1, record 12, English, - laser%20communications

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 OBS

Transmission de communications au moyen de faisceaux de lumière cohérente. Le laser assurera des liaisons à grande capacité.  1, record 12, French, - transmission%20par%20laser

Record 12,  Textual support,  Spanish