Terahertz wave generating apparatus and information obtaining apparatus
AssigneeCanon Kabusshiki Kaisha
InventorToshihiko Ouchi
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Abstract
The present invention relates to a terahertz wave generating apparatus including a terahertz wave generating element including a nonlinear optical crystal that generates a terahertz wave in response to light incident on the nonlinear optical crystal, a coupling member to extract the terahertz wave generated from the nonlinear optical crystal, a photodetector to detect light emitted from the nonlinear optical crystal, and an adjusting unit to adjust the light incident on the nonlinear optical crystal based on a result of detection by the photodetector.
Claims20
A terahertz wave generating apparatus comprising:
- a terahertz wave generating element including a nonlinear optical crystal configured to generates a terahertz wave in response to light incident on the nonlinear optical crystal;
- a coupling member configured to extract the terahertz wave generated from the nonlinear optical crystal;
- a photodetector configured to detect light emitted from the nonlinear optical crystal;
- and
- an adjusting unit configured to adjust the light incident on the nonlinear optical crystal based on a result of detection by the photodetector.
An information obtaining apparatus that irradiates a sample with a terahertz wave to measure the terahertz wave from the sample, the apparatus comprising:
- a terahertz wave generating apparatus configured to generate the terahertz wave in response to the light, emitted from a light source, incident on the terahertz wave generating apparatus;
- an irradiation unit configured to irradiate the sample with the terahertz wave generated from the terahertz wave generating apparatus;
- and
- a detecting unit configured to detect the terahertz wave from the sample,
- wherein the terahertz wave generating apparatus comprising:
- a terahertz wave generating element including a nonlinear optical crystal configured to generate a terahertz wave in response to light incident on the nonlinear optical crystal;
- a coupling member configured to extract the terahertz wave generated from the nonlinear optical crystal;
- a photodetector configured to detect light emitted from the nonlinear optical crystal;
- and
- an adjusting unit configured to adjust the light incident on the nonlinear optical crystal based on a result of detection by the photodetector.
A method of generating a terahertz wave, the method comprising:
- allowing a nonlinear optical crystal to generate a terahertz wave in response to light incident on the nonlinear optical crystal;
- extracting the terahertz wave generated from the nonlinear optical crystal;
- detecting light emitted from the nonlinear optical crystal;
- and
- adjusting the light incident on the nonlinear optical crystal based on a result of detection.
Dependencies are inferred from the claim text.