WAVELENGTH CONVERSION CRYSTAL AND METHOD FOR GENERATING LASER BEAM, AND APPARATUS FOR GENERATING LASER BEAM

摘要

As a wavelength conversion crystal which can control double refraction, a crystal represented by the following formula (I): M<1>xM<2>1-xCa4O (BO3)3, wherein M<1> and M<2> each represent one or more rare earth elements and are different from each other, and 0 < X < 1, is used, and, a nonlinear optical crystal represented by the following formula (II): GdxY1-xCa4O (BO3)3, wherein 0.01