Optical transceiver using common optical path for...

H - Electricity – 04 – B

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H04B 10/02 (2006.01) H04B 10/10 (2006.01)

Patent

CA 2231889

An optical transceiver that is particularly adapted for free-space optical telecommunication uses the same optical path for received and transmitted light to a large extent to avoid duplication of optical elements. Received light is split so that different portions can be sent to physically spaced photodetectors, one of which is for detecting optically received information, and others of which are for detecting misalignment of the transceiver. In this way, the alignment detectors do not interfere with light reception by the information detector.

Émetteur-récepteur optique particulièrement bien adapté pour des transmissions de télécommunications optiques dans l'espace et utilisant le même chemin optique pour recevoir et transmettre la lumière afin, dans une large mesure, d'éliminer la duplication des éléments optiques. La lumière reçue est fractionnée afin que différentes parties puissent être transmisses à des photodétecteurs espacés. Un de ces photodétecteurs sert à déceler la présence d'information optique, tandis que les autres détectent le désalignement de l'émetteur-récepteur. De cette façon, les détecteurs d'alignement n'empêchent pas le détecteur d'information de recevoir la lumière.

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