Optical waveguides

Details Optical waveguides Optical waveguides

1989-08-31

1991-08-06

Sikes, William L.

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

G02B 610

Patent

active

050371681

ABSTRACT:
A smoothing layer is provided between the rough etched sides of a channel in a substrate in which an optical waveguiding material is to be produced. Losses are substantially reduced thereby. For a rectangular or rib waveguide, where the sides of the rib are left rough by etching, a smoothing layer is again provided over the rib. The smoothing layer preferably has a refractive index close to or the same as the materials having surface roughness.

REFERENCES:
patent: 4902086 (1990-02-01), Henry et al.

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