Optical multiplexer-demultiplexer for use with optical fiber wav

Details Optical multiplexer-demultiplexer for use with optical fiber wav Optical multiplexer-demultiplexer for use with optical fiber wav

1984-12-31

1986-12-16

Orsino, Jr., Joseph A.

Multiplex communications

Wide area network

Packet switching

350 9615, H04B 900

Patent

active

046302557

ABSTRACT:
The invention relates to an optical wavelength multiplexer-demultiplexer using optical fibers. For a bidirectional three-channel link with two go channels and one return channel the multiplexer-demultiplexer comprises a chamfered link fiber (30) provided with an interference filter (25) and optically coupled with three intermediate fibers (13, 14, 15). A first intermediate fiber (13) is chamfered and fitted with an interference filter (20) and has an optical axis which intersects the optical axis of the link fiber at a given angle (.theta.), while a second intermediate fiber (14) is coupled to the chamfered fiber, with the filter (20) providing multiplexing and demultiplexing between the two go channels. A third intermediate fiber (15 is applied to the cylindrical wall of the link fiber to receive or tansmit the return channel via the filter (25). The multiplexer-demultiplexer is applicable to optical fiber telecommunication systems.

REFERENCES:
patent: 4452505 (1984-06-01), Gasparian
Winzer et al.-"Single Mode and Multimode"-Applied Optics vol. 20, #18-15 Sep. 1981, pp. 3128-3135.
Winzer-"WDM Status and Trends"-Conference Europeenne Sur Les Communications Optiques-21,22 Sep. 1982, pp. 305-314.
Miyauchi et al.-"Compact Wavelength" Optics Letters vol. 5, No. 7. Jul. 1980, pp. 321-322.

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