Preparation of power laser single crystal slabs based on ytterbium-doped garnet aluminates with ASE suppression

摘要

Preparation power laser monocrystalline slabs diameter of the active medium of at least 70 mm on the basis of single crystals ytterbium doped aluminates garnet grown on oriented embryo drawing from the melt in a reducing atmosphere under the lid, wherein the reducing atmosphere over the melt (10) in a melt crucible (1) comprises in the course of melting at least 30% hydrogen is subsequently evacuated and the melt (10) is homogenized, freed of dissolved gases by stirring wire (7), whereby after this process, the vacuum is again replaced by a reducing atmosphere to initiate crystal growing on the embryo, then after reaching the desired size of the single crystal that further machined into the blank for forming the laser is weak, which is tempered at a high temperature in a controlled atmosphere to remove dislocations and conversion of the active laser ions and subsequently provided with an absorbent layer for suppressing the phenomenon of amplified spontaneous emission, wherein the optical interface of the absorbent layer laserující portion of the single crystal is indistinguishable in terms of refractive index and thermal expansion material. Further described is an apparatus for preparing monocrystalline laser power is weak.