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US 7,466,728 B2Granted
Method for laterally-coupling frequency-converted laser radiation out of a resonator
AssigneeCoherent, Inc.
InventorsDavid Clubley, R. Russel Austin
Life of this patent
Estimating the term…
Abstract
In traveling-wave ring-resonator an optically nonlinear crystal for converting visible radiation to ultraviolet (UV) radiation has an input face and two output faces. The visible light propagates through the crystal from the input face to one of the output faces. That output face is coated with a dichroic optical coating that transmits unconverted visible light and reflects the ultraviolet light. The reflected ultraviolet light exits the optically nonlinear crystal via the other output face and is coupled out of the resonator at an angle to the resonator axis.
Claims19
Optical apparatus comprising:
- an optical resonator having a resonator axis and arranged to cause a beam of optical radiation having a first-wavelength to circulate therein in one direction only along said resonator axis;
- and
- an optically nonlinear crystal located in said optical resonator on said resonator axis, said optically nonlinear crystal being arranged to convert said circulating first-wavelength wavelength radiation to optical radiation having a second wavelength shorter than said first-wavelength, and to reflectively couple said second-wavelength radiation out of said resonator at an angle to said resonator axis and wherein said optically nonlinear crystal has an input-face, and first and second output-faces and is arranged such that said circulating first wavelength radiation enters said crystal via said input face thereof and exits said optically nonlinear crystal via said first output face thereof, and such that said second-wavelength radiation is coupled out of said resonator via said second output face of said optically nonlinear crystal.
Optical apparatus comprising:
- an optical resonator having a resonator axis and arranged to cause a beam of optical radiation having a first-wavelength to circulate therein in one direction only along said resonator axis;
- and
- an optically nonlinear crystal located in said optical resonator on said resonator axis, said crystal being arranged to convert said circulating first-wavelength wavelength radiation to optical radiation having a second wavelength shorter than said first-wavelength, and to reflectively couple said second-wavelength radiation out of said resonator at an angle to said resonator axis and wherein said crystal has an input-face, and first and second output-faces, and wherein said first output face includes an optical coating being transmissive for the first wavelength and reflective for the second wavelength and wherein said faces are arranged so that said circulating first wavelength radiation enters said crystal via said input face thereof and exits said crystal via the coating on said first output face thereof, and such that said second-wavelength radiation is coupled out of said resonator via said second output face after being reflected by said coating on the first output face.
Optical apparatus comprising:
- an optical resonator having a resonator axis and arranged to cause a beam of optical radiation having a first-wavelength to circulate therein in one direction only along said resonator axis;
- and
- an optically nonlinear crystal located in said optical resonator on said resonator axis, said optically nonlinear crystal being arranged to convert said circulating first-wavelength wavelength radiation to optical radiation having a second wavelength shorter than said first-wavelength, and to reflectively couple said second-wavelength radiation out of said resonator at an angle to said resonator axis and wherein said optical resonator is a passive resonator formed by a plurality of mirrors and said optical resonator is configured such that first-wavelength radiation can be injected into said resonator via one of said plurality of mirrors to provide said circulating first-wavelength radiation and wherein said resonator is formed by two plane mirrors and two convex mirrors, wherein said optically nonlinear crystal is located between said convex mirrors, and wherein said first-wavelength radiation is injected into said resonator via one of said plane mirrors.
Dependencies are inferred from the claim text.