| 摘要 |
PURPOSE:To reduce thermal lens effect having anisotropy thermal abberation effect and thermal double refraction effect of a solid laser medium, by reducing anisotropic temperature rise in the surface vertical to the optical axis of the solid laser medium, when a pumping light source wherein the optical distribution of radiation light has anisotropy is used. CONSTITUTION:A heat dissipating film 6 is provided with a hole 6a brought into close contact with at least either one of the end surfaces of solid laser medium 5, and pumping light is inputted and/or outputted through the hole 6a, which has a shape compensating the anisotropic thermal distribution of the solid laser medium and obtaining an isotropic thermal distribution. By using the above heat dissipating film 6, thermal lens effect having anisotropoy in solid laser, thermal abberation effect and thermal double refraction effect can be reduced, so that the aberration of laser light can be reduced and it can be expected to obtain a high quality light beam. In a light source applying a second harmonic wave, the control of a plane of polarization is enabled up to large pumping light intensity, so that a green light source of high output and low noise can be obtained. |
