Patent 7916764 was granted and assigned to Coherent (operating system) on March, 2011 by the United States Patent and Trademark Office.
In harmonic-generating laser apparatus, plane-polarized fundamental radiation of a laser is converted to harmonic radiation by an optically nonlinear crystal. The power of harmonic radiation generated by the apparatus is selectively varied by selectively rotating the plane of polarization of fundamental radiation entering the optically nonlinear crystal.