Optical waveguides – With optical coupler – Plural
Patent
1996-08-07
1998-10-13
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Plural
385 31, 385 46, 359115, G02B 628
Patent
active
058224742
ABSTRACT:
An optical branching apparatus for branching optical transmission lines as reverse and forward links through a plurality of ports includes a plurality of demultiplexing units, a plurality of multiplexing units, and a plurality of optical transmission media. Each of the plurality of demultiplexing unit is arranged in each of the ports to demultiplex a light beam input from the optical transmission line in accordance with one of a wavelength and a wavelength band. Each of the plurality of multiplexing units is arranged in the each port to multiplex light beams having different wavelengths or wavelength bands demultiplexed by the demultiplexing units of remaining ports and outputs a multiplexed light beam to the optical transmission line. One of the wavelength and the wavelength band is determined in accordance with a combination of an optical transmission source and an optical transmission destination. Each of the plurality of optical transmission media connects the each demultiplexing unit to at least one of the multiplexing units of the remaining ports to perform optical transmission.
REFERENCES:
patent: 5194977 (1993-03-01), Nishio
patent: 5627925 (1997-05-01), Alferness et al.
patent: 5675676 (1997-10-01), Yamashita et al.
NEC Corporation
Palmer Phan T. H.
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