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Apparatus and methods for using achromatic phase matching at high orders of dispersion

United States Patent

September 11, 2001
View the Complete Patent at the US Patent & Trademark Office
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Achromatic phase-matching (APM) is used for efficiently multiplying the frequency of broad bandwidth light by using a nonlinear optical medium comprising a second-harmonic generation (SHG) crystal. Stationary optical elements whose configuration, properties, and arrangement have been optimized to match the dispersion characteristics of the SHG crystal to at least the second order. These elements include a plurality of prismatic elements for directing an input light beam onto the SHG crystal such that each ray wavelength is aligned to match the phase-matching angle for the crystal at each wavelength of light to at least the second order and such that every ray wavelength overlap within the crystal.
Richman; Bruce (Livermore, CA), Trebino; Rick (Atlanta, GA), Bisson; Scott (Livermore, CA), Sidick; Erkin (San Ramon, CA)
09/ 187,721
November 5, 1998
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract DE-AC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in this invention.