Electro-optic devices utilizing a sapphire substrate
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United States of America Patent
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Feb 27, 1990
Grant Date -
N/A
app pub date -
Nov 18, 1988
filing date -
Nov 18, 1988
priority date (Note) -
Expired
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Abstract
The present invention provides improved optical switching and modulation through the use of electrically assisted opto-optical devices and optically assisted electro-optical devices. The modulator and switches 34, 60 are guided wave devices comprising silicon channel waveguides on a sapphire substrate. An optically transparent sapphire substrate 12, 42, 62 is used to allow transmission of short wavelength light through the substrate to operate upon the silicon channels in the area of p-n junctions. This permits the construction of dual control electro-optical devices. These guided wave devices operate on light at wavelengths of 1.3 microns or higher.
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