The invention relates to an intracavity frequency-doubled diode-pumped laser. The aim of the invention is to provide a simple and inexpensive means with which interfering capacity variations of the laser radiation produced by means of the non-linear optical crystal at the beginning of the capacity adjustment can be avoided while at the same time preventing capacity-reducing elements in the resonator and thermal effects from having negative effects on the laser behavior. To this end, the laser contains a solid body as the laser-active medium which has a temperature gradient that is substantially parallel to the resonator axis. The laser radiation of a laser fundamental wave length is converted to a laser radiation of another wave length by means of a non-linear optical crystal with a lower effectiveness than required for obtaining the maximum capacity of the converted laser radiation. The inventive laser is especially useful for medical purposes, for example in the field of ophthalmology for coagulating the retina, but also in the field of dermatology.
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