US 5,497,388 AGranted

Laser diode pumped solid laser

AssigneeFuji Photo Film Co., Ltd.

InventorsChiaki Goto, Hiroaki Hyuga

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Abstract

A solid laser medium is pumped by a semiconductor laser in order to produce a solid laser beam. The solid laser beam having thereby been obtained is caused to impinge upon a crystal of a nonlinear optical material, and the wavelength of the solid laser beam is thereby converted into a different wavelength. A nonlinear optical coefficient of the crystal of the nonlinear optical material utilized for the wavelength conversion is represented by d.sub.IJ, where I, J=1, 2, 3, and an principal axis of indicatrix of the nonlinear optical material corresponding to J is represented by .alpha.. The direction of linear polarization of a laser beam, which is produced by the semiconductor laser and serves as a pumping beam, is set in the direction, which coincides with the principal axis of indicatrix .alpha. when it is viewed from the direction of incidence of the pumping beam.

Claims4

Dependent claims

A laser diode pumped solid laser for producing a wavelength-converted wave which is high in intensity, comprising:

a solid laser medium;
a semiconductor laser for producing a pumping beam which pumps said solid laser medium in order to produce a solid laser beam;
and
a crystal of a nonlinear optical material being impinged by said solid laser beam, thereby converting the wavelength of said solid laser beam into a different wavelength;
said crystal having a nonlinear optical coefficient d.sub.IJ, where I and J=1, 2, 3 correspond to x, y, and z principal axes, respectively;
said nonlinear optical coefficient being represented by the formula ##EQU1## wherein n.sub.x, n.sub.y, and n.sub.z represent principal refractive indices;
and
said pumping beam having a direction of linear polarization in a direction which coincides with a principal axis of an ellipsoid of wave normals when it is viewed from the direction of incidence of said pumping beam.

5 more elements

Dependencies are inferred from the claim text.