Bidirectional optical wavelength multiplexer-demultiplexer

Details Bidirectional optical wavelength multiplexer-demultiplexer Bidirectional optical wavelength multiplexer-demultiplexer

1984-10-09

1987-11-24

Lee, John

Multiplex communications

Wide area network

Packet switching

350 9618, 370 3, G02B 628

Patent

active

047084251

ABSTRACT:
A bidirectional optical wavelength multiplexing-demultiplexing device comprises a self-focusing lens having an index gradient and situated between the transmission fibre and filtering means and of which the length is such that the spatial separation between the outgoing wavelengths and the return wavelength is maximum, which permits decoupling of the return channel from the outgoing channels.

REFERENCES:
patent: 4198117 (1980-04-01), Kobayashi
patent: 4449782 (1984-05-01), Korth
patent: 4522462 (1985-06-01), Large et al.
patent: 4550975 (1985-11-01), Levinson et al.
Metcalf et al., "High-Capacity Wavelength Demultiplexer with a Large-Diameter GRIN Rod Lens," Applied Optics, vol. 21, No. 5 (Mar. 1982), pp. 794-796.
Sono, K., et al., "Graded-Index Rod Lenses," Laser Focus, vol. 17, No. 2, (Feb. 1981), pp. 70-74.
Conference Europeenne Sur Les Communications Optiques, 21-24 Sep. 1982, Cannes, France; E. Pelletier et al: "Filtres Optiques Interferentiels Pour Multiplexeurs et Demultiplexeurs Destines Aux Communications Par Fibres", pp. 532-536; p. 533, 1s, 27-50.
Conference Europeenne Sur Les Communications Optiques, 21-24 Sep. 1982, Cannes, France; G. Winzer: "Multiplexage de Longuers d'Ondes-Situation et Tendances", pp. 305-314, tableau 1; FIGS. 4, 6.
Siemens Forsch.-U. Entwickl.-Ber., vol. 8, No. 3, 1979, Springer-Verlag; D. Rosenberger: "Microoptic Passive Devices for Multimode Optical Fiber Communication Systems", pp. 125-129, FIGS. 7, 9.

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