Wavelength conversion crystal and method for generating laser beam, and apparatus for generating laser beam
AssigneeJapan Science and Technology Corporation
InventorsTakatomo Sasaki, Yusuke Mori, Masashi Yoshimura
Life of this patent
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Abstract
As a wavelength conversion crystal whose double refraction index is controllable, a crystal represented by a formula (I), M1xM21−xCa4O(BL3)3, where each of M1 and M2 represents one or more types of different rare earth elements and 0<x<1, is used, and as a novel means for second harmonics generation, a nonlinear optical crystal represented by a formula (II), GdxY1−xCa4O(BO3)3, where 0.01≦x≦0.35, is used to generate second harmonics.
Claims15
A wavelength conversion crystal represented by a formula (I), M1xM21−xCa4O(BO3)3, wherein each of M1 and M2 represents one or more types of different rare earth elements selected from the group consisting of Gd, Y, La and Lu, and 0<x<1.
A nonlinear optical crystal for second harmonics generation represented by a formula (II), GdxY1−xCa4O(BO3)3, wherein 0.01≦x≦0.35.
An apparatus for generating a laser beam comprising a nonlinear optical crystal element, which is a calcium oxyborate-type crystal comprising Gd and Y, to which Yd or Nd is doped, said nonlinear optical crystal element performing both the laser oscillation of a fundamental wave and generation of laser beams of second and third harmonics.
Dependencies are inferred from the claim text.