Ytterbium-doped crystal as well as growth method and application thereof

Abstract

The invention relates to a ytterbium-doped crystal as well as a growth method and application thereof. The molecular formula of the ytterbium-doped crystal is Ca3-3xYb3xRGa3Si2O14, wherein R represents an Nb ion or a Ta ion, and the doping concentration of a Yb ion is 0.1at.%-50at.%. The ytterbium-doped simultaneously has a laser emission effect and a nonlinear optical effect and is a self-frequency-doubling laser crystal with excellent performance. Compared with a laser device formed by combining laser crystals with nonlinear optical crystals, a self-frequency-doubling green laser device prepared from the ytterbium-doped crystal has the advantages that the volume is relatively small, the structure is relatively compact, the production cost is greatly lowered, meanwhile, the machining and assembling links are simplified, and the production efficiency is improved.

Description

technical field [0001] The invention relates to an ytterbium-doped crystal, a growth method and application thereof, and belongs to the field of crystal growth and laser technology. Background technique [0002] In recent years, visible light lasers have attracted more and more attention because of their important applications in the environment, medical, military and other fields. [0003] At present, to obtain visible laser light, mainly use Nd-doped 3+ and Yb 3+ Plasma laser crystals generate lasers in the 0.9μm, 1.06μm, and 1.3μm bands, which are then frequency-multiplied by nonlinear optical crystals such as KTP. The laser crystal and the KTP crystal are bonded together by optical glue, and the surface of the crystal and the glued surface are coated to form laser oscillation to obtain high-efficiency green light output, which has been commercialized. However, this kind of laser that uses two kinds of crystal materials, the laser working medium and the frequency doubl...

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Problems solved by technology

These crystals all have different significant defects, among which Yb:MgO:LiNbO 3 The anti-photodamage threshold of Yb:YCOB and Yb:GdCOB is low and has a photorefractive effect. The stimulated emission cross section of Yb:YCOB and Yb:GdCOB is small. Although the self-frequency doubling green light output has been realized, there is no report on the output power at present, and the Yb:YCOB: YAB crystals are molten compounds with non-identical components, and can only grow single crystals by high-temperature melt method. The growth cycle is long, and it is difficult to obtain large-size high-quality crystals, which is difficult to meet the needs of mass production.

Therefore, self-frequency doubling crystals that can be practically applied are still very limited at present, and exploring new excellent materials has always been the relentless pursuit of crystal material researchers.

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