Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-11-19
1994-11-29
Goldstein, Herbert
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359119, 370 855, H04J 1400
Patent
active
053695151
ABSTRACT:
A node for a loop type optical LAN using wavelength division multiplexing includes a light branching device for partially branching light from a loop of the optical LAN and a tunable filter for filtering a signal having a desired wavelength from the light branched by the branching device. The node may further include a light source for transmitting a signal to a loop of the optical LAN, an optical demultiplexer for selecting from the loop light having the same wavelength as the signal transmitted by the light source and an absorbing device for absorbing the entire amount of the signal transmitted by the light source after the signal once circulates the loop and is selected from the loop by the optical demultiplexer.
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Canon Kabushiki Kaisha
Goldstein Herbert
Moller Richard A.
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