Low-threshold yellow light solid laser based on energy transfer

Abstract

The invention discloses a low-threshold yellow light solid-state laser based on energy transfer. The low-threshold yellow light solid-state laser comprises a pumping source, a focusing coupling system and a resonant cavity, the resonant cavity comprises an input mirror, an output mirror and a laser gain medium, the input mirror and the output mirror are oppositely arranged in a resonant cavity body, the laser gain medium is Ce, Dy: LuGdAG transparent ceramic, the chemical formula of the laser gain medium is (Gd1-x-y-zLuxDyyCez) 3Al5O12, x is larger than or equal to 0.30 and smaller than or equal to 0.5, y is larger than or equal to 0.03 and smaller than or equal to 0.3, z is larger than or equal to 0.005 and smaller than or equal to 0.02, and the Ce, Dy: LuGdAG transparent ceramic is prepared through a coprecipitation method. Ce, Dy: LuGdAG transparent ceramic is adopted as a laser gain medium, Ce < 3 + > is co-doped, Dy < 3 + > can transmit absorbed photon energy of wavelength to Ce < 3 + >, so that 5d-4f transition of Ce < 3 + > is increased, doping of Gd < 3 + > improves energy level loss among ions, in addition, Gd < 3 + > is doped as ions with large radiuses, so that crystal lattices doped with multiple ions are more stable, and finally, efficient yellow laser output is realized.

Description

technical field

[0001] The invention belongs to the field of solid-state lasers, in particular to a low-threshold yellow light solid-state laser based on energy transfer. Background technique

[0002] Yellow laser (550-620nm) has important applications in spectral analysis, lidar, medical cosmetology and biochemical monitoring. There are several ways to obtain the yellow light band: nonlinear crystal frequency doubling (patent CN105071217), dual-wavelength sum-frequency, fiber laser combined with nonlinear optical technology, and Raman laser. However, the above methods are mainly realized by nonlinear frequency conversion of infrared lasers. This results in: on the one hand, the fundamental frequency optical mode competition in the nonlinear conversion process leads to poor stability of the yellow light output power and poor beam quality; on the other hand, the complexity of the system directly leads to the larger volume of the laser , which has a serious impact on the rel...

Images