Multiplex communications – Wide area network – Packet switching
Patent
1982-06-07
1984-11-13
Orsino, Jr., Joseph A.
Multiplex communications
Wide area network
Packet switching
350 9619, H04B 900
Patent
active
044829949
ABSTRACT:
An optical multiplexer/demultiplexer is used in a wavelength division multiplexing. An optical energy transmission body has N side faces, where N is equal to or larger than three. A first predetermined one of the N side faces directs a single beam of radiant energy, at a predetermined angle, into or out of the body for carrying out the demultiplexing or multiplexing operation. The single beam contains M preselected wavelengths, where M is equal to or smaller than N-1. A plurality of beam passing means are associated in a one-to-one correspondence with (M-1) of the N side faces. The beams which pass through the M-1 side faces contain a corresponding one of M wavelengths and reflect a beam containing at least one of the M wavelengths, other than the corresponding wavelength. Another of the N side faces passes a beam which is finally reflected by the plurality of beam passing means. Also associated, in one-to-one correspondence, with the plurality of beam passing means and with the other N side face is a beam receiving or emanating means for a corresponding one of the beams passing through the beam passing means and the other N side face, for the completing demultiplexing or multiplexing operation.
REFERENCES:
patent: 4244045 (1981-01-01), Nosu et al.
Miyazaki, Kiyoshi et al. "Optical Multiplexer/Demultiplexers Using Thin-Film Optical Filters", Dec. 1980, 17-36.
Miki, Tetsuya et al. "Viabilities of the Wavelength-Division-Multiplexing Transmission System Over an Optical Fiber Cable", Jul. 1978, 1082-1087.
Ishikawa, Shigeta et al. "Wavelength-Division Multiplexers/Demultiplexers", Oct. 1980, 65-71.
Electronics Letters, Jul. 5, 1979, vol. 15, No. 14, pp. 414 & 415, "Multireflection Optical Multi/Demultiplexer Using Interference Filters", by Kiyoshi Nosu, Hideki Ishio, and Kunio Hashimoto.
Greer Timothy K.
Nippon Electric Co. Ltd.
Orsino Jr. Joseph A.
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