Reversible device for the demultiplexing of several light signal

Details Reversible device for the demultiplexing of several light signal Reversible device for the demultiplexing of several light signal

1986-03-13

1988-04-26

Orsino, Jr., Joseph A.

Multiplex communications

Wide area network

Packet switching

350 9611, 350 9612, 350 9619, H04B 900

Patent

active

047409517

ABSTRACT:
A reversible device for demultiplexing several light signals in integrated optics is more particularly intended to separate n light signals of different wavelengths forming a light beam and transmitted by a first optical fiber and for respectively reinjecting into n second optical fibers the n light signals. Produced in a light guide, it comprises achromatic input optics for rendering parallel said light beam, n gratings arranged in cascade form and operating under Bragg conditions, each grating serving to diffract that part of the light beam carrying one of the n light signals and transmitting the not yet diffracted part of said light beam in the direction of the following grating, as well as n output optics associated with n gratings, each output optics being used for focussing that part of the light beam diffracted by the associated grating.

REFERENCES:
patent: 3814498 (1974-06-01), Tomlinson, III et al.
patent: 4449782 (1984-05-01), Korth
patent: 4547262 (1985-10-01), Spillman, Jr. et al.
Spear-Zino et al-"Multiwavelength Monolithic-"SPIE vol. 239, Guided Wave Optical & Surface Wave Devices Systems and Applications 1980, pp. 293-298.
Stutius-Silicon Nitride Films-Applied Optics-vol. 16, #12 Dec. 1977, pp. 3218-3222.
Applied Physics Letters, vol. 40, No. 2, Jan. 1982.
Soviet Physics/Technical Physics, vol. 26, No. 6, Jun. 1981.

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