Optical communications systems

Details Optical communications systems Optical communications systems

H - Electricity

04

B

H04B 10/00 (2006.01) H04B 10/20 (2006.01) H04B 10/24 (2006.01) H04N 7/22 (2006.01)

Patent

CA 2057066

A system for distributing interactive HDTY signals includes a head-end station (1) and a number of customer stations (3). The head-end station (1) includes at least one optical source. A bi-directional transmissive broadband passive branched optical network (2) distributes HDTV signals form the head-end station (1) to the customer stations (3). Each customer station (3) in- eludes an optieal coupler (6) arranged to couple the subscriber station (3) to a respective arm of the optical network (23, a coherent receiver including a local oscillator laser (7) and a transmitter arranged to modulate light from the local oscillator laser (7) with return data for transmission via the coupler (6) onto the network. The head-end station (1) also includes a broadband optical re- ceiver arranged to receive and demodulate the return data received via the optical network (2).

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