Integrated optical multiplex-demultiplex module for optical comm

Details Integrated optical multiplex-demultiplex module for optical comm Integrated optical multiplex-demultiplex module for optical comm

1986-12-03

1988-07-26

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

350 9611, 350 9619, 455606, H04B 900

Patent

active

047605693

ABSTRACT:
A multiplex-demultiplex module having a laser diode and a strip waveguide leading from said laser diode being disposed on a first surface of a substrate and the waveguide extends to an out-coupling and in-coupling location characterized by a single combined grating being arranged on the first surface of the substrate having its grid lines extending perpendicular to the direction of radiation guided in the waveguide and dimensioned so that it will not influence the laser emissions of a first wavelength from the laser diode but will steer radiation supplied from an in-coupling location and having a second wavelength differing from the first wavelength through the substrate onto a photo diode located under the opposite surface of the substrate. The grating thus acts as both a frequency-selective and a diffracting grating and replaces the two gratings in previously known devices.

REFERENCES:
patent: 4640574 (1987-02-01), Unger
Unger, "Planar and Integrated Multi-and Demultiplexers", Proceedings of the Sixth European Conference on Circuit Theory and Design, Sep. 6-8, 1983, VDE-Verlag GmbH, Berlin, pp. 387-389.
Flanders et al., "Grating Filters for Thin-Film Optical Waveguides", Applied Physics Letters, vol. 24, No. 4, 15 Feb. 1974, pp. 194-196.
Tamir, "3. Beam and Waveguide Couplers", Integrated Optics, Springer-Verlag Berlin, Heidelberg, New York, 1975, pp. 83-135.
Flugge, Encyclopedia of Physics, vol. XXIX, Optical Instruments, Springer-Verlag, Berlin-Heidelberg-New York, 1967, pp. 564-610.

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