Borosilicate glass and preparation method and application thereof

Abstract

The invention belongs to the technical field of laser and an optical fiber, and particularly relates to borosilicate glass and a preparation method and application thereof. The borosilicate glass in the invention is mainly prepared from the following raw materials in molar percentage: 38 to 60% of silicon dioxide, 2 to 10% of boron oxide, 10 to 35% of alkali metal oxide, 10 to 35% of alkaline earth metal oxide, 2 to 15% of intermediate oxide and 0.1 to 3% of rare earth oxide. The borosilicate glass has properties of capacity for high concentration rare earth doping and high devitrification (crystallization, phase splitting and the like) temperature, has a large difference value between the devitrification temperature and a softening temperature, is excellent in mechanical property and adjustable in refractive index and can be applied to a high-power solid laser and / or an optical fiber laser.

Description

technical field [0001] The invention relates to the technical field of laser and optical fiber, in particular to a borosilicate glass and its preparation method and application. Background technique [0002] Since the birth of lasers in the 1960s, solid-state lasers have developed rapidly and are widely used in industrial, medical, scientific research, military and other fields. As the core device in solid-state lasers, the performance of the gain medium (including laser crystals, transparent ceramics and glass, etc.) is very important, especially in some high-power solid-state lasers, the gain medium is required to have high rare earth doping and mechanical strength, etc. to increase the gain factor and damage threshold. In laser glass, the melting point of fluoride glass and chalcogenide glass is usually low, and its mechanical strength is generally not as good as that of silicate glass. Even phosphate glass, which belongs to oxide glass, has a high solubility of rare ear...

AI Technical Summary

Problems solved by technology

Due to the low solubility of rare earth ions in quartz fiber, to achieve higher power laser output, the length of the fiber needs to be increased, which will make it difficult to achieve higher power narrow-linewidth single-frequency laser output in the quartz fiber resonator. Solve A feasible solution to this problem is to prepare high-concentration rare-earth-doped optical fibers, which requires the glass matrix of the optical fiber to have a higher rare-earth doping degree to shorten the length of the gain fiber

The rare earth solubility of multi-component glass is higher than that of quartz, but the softening point of glass optical fibers such as fluoride and chalcogenide is low, and it is difficult to weld with quartz optical fibers, and it is difficult to achieve commercial high-power laser output

Ordinary silicate glass optical fiber has a high softening point and is easy to be fused with quartz optical fiber, but the solubility of rare earth is usually low. If the rare earth element is doped higher, the difference between the devitrification (crystallization, segregation, etc.) temperature and softening temperature will be Reduced, even the glass will lose its clarity as soon as it softens, which cannot meet the requirements of the optical fiber drawing process

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