A method for making gain medium for high-energy solid-state dye laser

Abstract

The invention relates to a gain medium used for a high-energy solid-state dye laser. A making method of the gain medium comprises the steps that 1 an outer layer is made, and a non-dye base material in the form of sol is placed into a specially-shaped cup A, wherein the specially-shaped cup A is a concave structure; 2 the material is placed into a 40 DEG C thermotank to form gel through polycondensation, drying is conducted for 10-14 days, and then plain blank is formed; 3 the plain blank is taken out to be placed into a tray; 4 an inner layer is made, and laser-doped dye which is additionally made and is in the form of sol is carefully placed into the groove of the plain blank in a filling mode; 5 the plain blank is placed into the thermotank again to form gel through polycondensation, and drying is conducted for 30-60 days under the environment that the temperature is 40-80 DEG C; 6 the object obtained in the step 5 is taken out and divided; 7 machining and polishing are conducted. For the large-area side pumping mode, special design is conducted on the gain medium, therefore, better light beam quality can be obtained and the conversion efficiency of the dye laser is increased to some extent.

Description

technical field [0001] The invention relates to a medical laser gain medium, in particular to a long-life gain medium for a high-energy solid dye laser and a manufacturing method thereof. Background technique [0002] The 585nm band is at the absorption peak of hemoglobin. The pulsed laser in this band acts selectively on hemoglobin. It has become the first choice for the treatment of vascular diseases such as microvenous malformation and telangiectasia. Dye lasers have the advantage of a wide tunable range. Using different dyes can easily cover the wavelength band from ultraviolet to infrared. Therefore, laser dyes are generally used as gain media for high-energy 585nm laser output. Early dye lasers all used liquid dyes, which have the advantages of good output laser beam quality, easy cooling of the dye solution, and thus high energy and high repetition frequency operation. However, liquid dye lasers also have great defects: liquid dyes are toxic and flammable to the huma...

AI Technical Summary

Problems solved by technology

However, liquid dye lasers also have great defects: liquid dyes are toxic and flammable to the human body; the circulating cooling system is large and complex in design; Replacement of dye solution, cleaning of the circulation system, high cost of use and maintenance

However, the existing solid-state dye lasers all adopt a simple end-pumped structure, and there are still some deficiencies: 1. In the operation mode of high energy and high repetition frequency, the transient absorption of dye molecules that exists for a long time is gradually established, thereby gradually reducing The output efficiency of the laser shortens the life of the solid dye; 2. The light-receiving area of ​​the solid dye in the simple pumping method is not large enough. For large pump energy, the energy density of the pump light is very high, which affects the life of the solid laser dye; 3. The life of the solid laser dye is affected by high energy pumping. Heat buildup in the solid dye, resulting in reduced laser efficiency, reduced beam quality, and shorter lifetime

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