An optical fiber point-to-multipoint communications network is disclosed of the type having a bus topology. The broadcasting terminal (101) of the network includes an information transmitting laser (102) and a local oscillator laser (103) the signals of which are launched onto opposite ends of an optical...http://www.google.de/patents/US5058101?utm_source=gb-gplus-sharePatent US5058101 - Coherent detection loop distribution system
