Optical multiplexer and demultiplexer

Details Optical multiplexer and demultiplexer Optical multiplexer and demultiplexer

1979-01-31

1981-01-06

Britton, Howard W.

Multiplex communications

Wide area network

Packet switching

455612, 455617, H04B 900

Patent

active

042440459

ABSTRACT:
An optical multiplexer and/or optical demultiplexer for multiplexing and/or demultiplexing a plurality of wavelengths comprises a plurality of optical filters each of which transmits a predetermined wavelength and reflects other wavelengths, said optical filters being arranged so that an optical beam is transmitted or reflected via each optical filter in sequence in a zigzag fashion. A light source or light detector is provided behind each optical filter to project or receive a collimated optical beam. The angle of incidence when a beam is applied to an optical filter is small. And, another optical means is provided to connect the present optical multiplexer and/or demultiplexer with an outside optical fiber. The transmission wavelength of each optical filter is different from the others.

REFERENCES:
patent: 3403260 (1968-09-01), Geusic
patent: 3623797 (1971-11-01), Daw
patent: 3703640 (1972-11-01), Broussaud
patent: 3953727 (1976-04-01), d'Auria
patent: 4001577 (1977-01-01), Albanese

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