Mode selection laser

The utility model relates to a mode selection laser which comprises a pumping source, a laser crystal and a mode selection crystal, the laser crystal and the mode selection crystal are sequentially arranged in the light emitting direction of the pumping source, a first light beam output by the pumping source is incident to the laser crystal so that the laser crystal can output a second light beam, and the second light beam utilizes the absorption effect of the mode selection crystal so that the second light beam can be output. And outputting a light beam with a preset wavelength. According to the invention, the stability of the mode selection laser can be improved. 本申请涉及一种选模激光器，包括泵浦源和依次设置于所述泵浦源出光方向上的激光晶体和选模晶体，所述泵浦源输出的第一光束入射至所述激光晶体，以使所述激光晶体输出第二光束，所述第二光束利用所述选模晶体的吸收效应，以输出预设波长的光束。本申请有助于提升选模激光器的稳定性。