Wavelength sensitive optical devices
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United States of America Patent
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-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Mar 21, 1988
filing date -
Jul 22, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical device for use as an optical filter or modulator comprises an optical waveguide including a portion having a refractive index that varies with optical intensity and a mechanism for providing and directing at least two coherent waves at that portion such that a standing wave of a modulated refractive index is established by interference between the coherent waves. The standing wave provides a temporary modulated index grating in the waveguide.
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