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US 7,889,769 B2Granted
Multi-spectral laser source employing periodically poled crystal mixer
AssigneeWisconsin Alumni Research Foundation
InventorScott Thomas Sanders
Life of this patent
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Abstract
A multi-spectral laser system produces first and second output frequencies by nonlinear mixing of a first, second, and third laser light frequency in a single periodically polled crystal, where the first and second output frequencies are separated by a range greater than the degeneracy of the crystal.
Claims20
A multi-spectral laser light source comprising:
- a first, second, and third laser beam providing laser light at first, second and third frequencies, respectively;
- a periodically poled nonlinear crystal positioned to receive the first, second, and third laser beams to provide a multi-spectral output including a first output frequency being a sum or difference in frequency between the first and second frequencies and a second output frequency being sum or difference in frequency between the second and third frequencies;
- wherein the periodically poled nonlinear crystal provides substantial nonlinear mixing of the laser light at the first and second frequencies and at the second and third frequencies, but not at the second frequency and a range of frequencies between the first and third frequencies.
A method of producing multi-spectral laser light comprising:
- (a) producing laser light at first, second and third frequencies, respectively;
- (b) mixing the first, second, and third frequencies in a periodically poled nonlinear crystal positioned to receive laser light simultaneously from the first, second and third lasers and to provide a multi-spectral output including a first output frequency being a sum or difference in frequency between the first and second frequencies and a second output frequency being sum or difference in frequency between the second and third frequencies;
- wherein the periodically poled nonlinear crystal provides substantial nonlinear mixing of the laser light at the first and second frequencies and at the second and third frequencies, but not at the second frequency and a range of frequencies between the first and third frequencies.
Dependencies are inferred from the claim text.