Wavelength multiplexer-demultiplexer

Details Wavelength multiplexer-demultiplexer Wavelength multiplexer-demultiplexer

1980-04-23

1984-11-20

Lee, John

Multiplex communications

Wide area network

Packet switching

350 9612, 370 1, G02B 514, H04J 1500

Patent

active

044835825

ABSTRACT:
A multiwavelength multiplexer-demultiplexer constructed from units each cble of multiplexing or demultiplexing two wavelengths. As many such units as required can be interconnected to form multiplexer-demultiplexers of any number of wavelengths. Each two-wavelength multiplexer-demultiplexer unit includes a four-port power divider, a four-port phase shifter having two ports connected to two ports of the power divider, and another four-port power divider having two ports connected to two ports of the phase shifter. The power divider may be a single-mode optical fiber directional coupler, or a half-silvered mirror beam splitter. The phase shifter may include a pair of single mode optical fibers or a pair of oppositely disposed mirrors.

REFERENCES:
patent: 3920314 (1975-11-01), Yajima
patent: 3957341 (1976-05-01), Taylor
patent: 4142775 (1979-03-01), Ramaswamy et al.
patent: 4153328 (1979-05-01), Wang
patent: 4223977 (1980-09-01), Papuchon et al.

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