Optical substrate with light absorbing segments

Details Optical substrate with light absorbing segments Optical substrate with light absorbing segments

1992-11-06

1994-06-14

Bovernick, Rodney B.

Optical waveguides

Integrated optical circuit

385129, G02B 612

Patent

active

053217799

ABSTRACT:
A substrate for use with integrated optical circuits. The substrate includes an input surface and an output surface for respectively receiving light to the substrate and transmitting light from the substrate. Lateral surfaces extend between the input and output surfaces. A light propagation path extends between the input and output surfaces. One or more cavities extend from the lateral surfaces to the interior of the substrate. The boundary between the cavities and the substrate bear an optical absorber. With this configuration, stray light within the substrate, e.g. from the input surface from the declined propagation path is absorbed by the absorbers before it can reflectively be transmitted back to the defined propagation path and output surface.

REFERENCES:
patent: 4348074 (1982-09-01), Burns et al.

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