Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-01-16
1991-10-15
Kuntz, Curtis
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
385 24, 359157, H04J 100
Patent
active
050581015
ABSTRACT:
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 fiber bus (104) to counter-propagate thereon. At each of the M stations (105-1-105-M) connected to the bus, a wideband directional coupler (106-1-106-M) couples portions of each of the counter-propagating signals to a balanced coherent detector (107-1-107-M). The effective total power input to the balanced coherent detector at each of the stations is equal regardless of the location of the station relative to the broadcasting terminal. In another embodiment the stations are connected to ring-shaped optical subbuses which are coupled to the main bus. Several two-way point-to-multipoint embodiments are disclosed which employ wavelength division multiplexing techniques to enable communications from the stations back to the broadcasting terminal.
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Albanese Andres
Menendez Ronald C.
Bell Communications Research Inc.
Falk James W.
Kuntz Curtis
Negash Kinfe-Michael
Suchyta Leonard Charles
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