Optical intersatellite communications system for...

H - Electricity – 04 – B

Patent

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H04B 10/105 (2006.01) H04B 7/208 (2006.01) H04B 10/155 (2006.01) H04L 7/04 (2006.01) H04L 7/00 (2006.01)

Patent

CA 2314270

The optical intersatellite communications system comprises two separate ranges of the bandwidth such, that a first range is provided for a synchronization channel of a narrow bandwidth for the transmission of synchronization frames of a fixed data rate, and a second range of a broad bandwidth is provided for a transparent link. The corresponding communications arrangement comprises an electro-optical phase modulator (81) for modulating the laser light from a TX laser (82) and for passing the modulated laser light to the one end of a transparent link, which transmits the laser beam (84). A data signal unit (86) at the transmitter end and a syncbit unit (87) are connected to a linkage circuit (85). On the output side the linkage circuit (85) is connected to an electro-optical modulator driver (88), which is connected via a linearizer (89) with the input of the electro-optical phase modulator (81). The linearizer compensates the intermodulation products of the third and fifth orders.

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