Optical filter and optical device using same

Details Optical filter and optical device using same Optical filter and optical device using same

1986-11-13

1988-12-13

LaRoche, Eugene R.

G02B 610

Patent

active

047906146

ABSTRACT:
An optical filter is formed by providing a plurality of gaps, which have a desired width and such a depth that is larger than the thickness of the waveguide layer, in a slab or a waveguide layer in a three-dimensional optical waveguide so as to extend in the light propagating direction at desired period intervals. These gaps are filled with a film of a material, the refractive index of which is different from that of the waveguide layer, to complete the optical filter. A multiplex wavelength transmission device is formed monolithically by providing at least one optical filter, which is formed in the above-mentioned manner, in an optical waveguide, and arranging one or both of a light-emitting semiconductor element and a photodetector on the side of an optical signal which has passed through the optical filter, and on the side of an optical signal which has been reflected on the same optical filter.

REFERENCES:
patent: 3970360 (1976-07-01), Kersten et al.
patent: 4141621 (1979-02-01), Aagard et al.
patent: 4693544 (1987-09-01), Yamasaki et al.

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