Method of generating tunable coherent ultraviolet light at wavelengths below 2500 A
AssigneeOregon Graduate Center for Study and Research
InventorGail A. Massey
Life of this patent
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Abstract
A method for obtaining efficient production of short-wavelength, continuously-tunable ultraviolet light by parametric mixing of optical frequency radiation in a nonlinear crystal. The method involves mixing the second harmonic of a tunable, visible-wavelength laser, an organic dye laser, for example, with the fixed-wavelength output of a near-infrared laser, e.g., a Nd:YAG laser, in a conventional nonlinear crystalline material such as ADP or KDP.
Claims12
The method of generating tunable, coherent optical radiation having a short wavelength ultraviolet component in the range of about 2000 to about 2500 A which comprises sum frequency phase matching in a crystal having second order nonlinear polarisability, coherent infrared radiation having a wavelength of about 1060 nm with coherent ultraviolet radiation consisting of the second harmonic of the coherent output from a wavelength-tunable source of visible-wavelength radiation.
The method of generating coherent optical radiation having a short wavelength ultraviolet component in the range of about 2000-2500 A which comprises
- providing a wavelength-tunable source of coherent, visible-wavelength radiation,
- frequency doubling the visible-wavelength radiation from said source to provide coherent, near-ultraviolet radiation,
- providing coherent infrared radiation having a wavelength in the range of about 950-1100 nm, and
- frequency summing said infrared radiation and near-ultraviolet radiation by phase matching in a crystalline material having second order nonlinear polarisability.
The method of generating tunable, coherent optical radiation having a short wavelength ultraviolet component in the range of about 2000-2350 A which comprises
- providing a wavelength-tunable source of coherent, visible-wavelength radiation,
- frequency doubling the visible-wavelength radiation from said source to provide coherent, near-ultraviolet radiation having a wavelength in the range of about 2500 to about 3100 A,
- providing coherent infrared radiation at a wavelength of about 1064 nm, and
- frequency summing said infrared radiation and near-ultraviolet radiation by phase matching in an ammonium dihydrogen phosphate crystal.
The method of generating tunable, coherent optical radiation of a short wavelength ultraviolet component in the range of about 2000 to about 2500 A which comprises
- providing a fixed wavelength source of coherent infrared radiation,
- providing a wavelength-tunable source of coherent, near-ultraviolet radiation, and
- frequency summing radiation from said infrared source and radiation from said near-ultraviolet source in a crystalline material having second order nonlinear polarisability to provide coherent optical radiation within said range.
Dependencies are inferred from the claim text.