Light conversion systems, methods, and devices
AssigneeGoodrich Lighting Systems GmbH
InventorsUrcan Guler, Matthew R. Pearson, Joseph V. Mantese
Life of this patent
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Abstract
A nonlinear converter may comprise: alternating layers of a dielectric material and a metal material; a first refractive index of the nonlinear converter for a first wavelength (i.e., input wavelength or pump wavelength) between 207 nm and 237 nm, the first refractive index being less than 0.5, the first refractive index corresponding to metal fill ratio; and a second refractive index of the nonlinear converter for a second wavelength (i.e., output wavelength or SHG wavelength), the second wavelength being approximately double the first wavelength, the second refractive index corresponding to the metal fill ratio.
Claims16
A nonlinear converter comprising:
- alternating layers of a dielectric material and a metal material, the nonlinear converter configured to receive a first wavelength and output a second wavelength;
- a first refractive index of the nonlinear converter for the first wavelength, the first wavelength being between 414 nm and 474 nm, the first refractive index corresponding to a metal fill ratio;
- and
- a second refractive index of the nonlinear converter for the second wavelength, the second wavelength being between 207 nm and 237 nm, the second refractive index between 0 and 0.3, the second refractive index corresponding to the metal fill ratio.
A sanitization apparatus, comprising:
- a light source configured to emit a light having a first wavelength between 414 and 474 nm;
- and
- a nonlinear converter disposed proximate to the light source, the nonlinear converter comprising alternating layers of a dielectric material and metal material, the nonlinear converter configured to provide a phase mismatch between an input wavelength and a second harmonic generation wavelength between 0% and 10% within the nonlinear converter, wherein:
- a first refractive index of the nonlinear converter for the second harmonic generation wavelength is less than 0.5, the first refractive index corresponding to metal fill ratio of the alternating layers, and
- a second refractive index of the nonlinear converter for the input wavelength is approximately double the first refractive index.
A method of sanitizing a surface, comprising:
- generating a light having a first wavelength between 414 and 474 nm;
- and
- converting the light into a first portion of the light having the first wavelength and a second portion of the light having a second wavelength, the second wavelength being half the first wavelength, converting the light being through a phase-mismatch free medium, the phase-mismatch free medium including a phase mismatch between 0% and 10%, wherein converting the light further comprises generating, via a nonlinear converter, a third wavelength corresponding to the first wavelength and a fourth wavelength corresponding to the second wavelength, the third wavelength and the fourth wavelength being approximately equal.
Dependencies are inferred from the claim text.