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US 4,907,850 AGranted
Apparatus for periodically generating second harmonic
AssigneeCanon Kabushiki Kaisha
InventorsKeisuke Araki, Kenichi Ohta
Life of this patent
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Abstract
An apparatus for periodically generating a second harmonic light comprises: a light source; and means for converting a fundamental wavelength light emitted from said light source to a second harmonic light, including optical wave guide means having a light propagation area and means for periodically varying a refractive index of the light propagation area.
Claims6
An apparatus for periodically generating a second harmonic light comprising:
- a light source, and
- means for converting a fundamental wavelength light emitted from said light source to a second harmonic light, including optical wave guide means having a light propagation area and means for time-periodically varying a refractive index of the light propagation area over a range that includes at least one state which permits phase matching.
An element for converting a fundamental wavelength light to a second harmonic light comprising:
- optical wave guide means having a light propagation area;
- and
- means for time-periodically varying a refractive index of said light propagation area over a range that includes at least one state which permits phase matching.
Dependencies are inferred from the claim text.