Phosphate laser neodymium glass

Abstract

The invention provides phosphate laser neodymium glass. The phosphate laser neodymium glass is higher in stimulated emission cross section, small in thermo-optical coefficient and suitable for high-power laser devices. The phosphate laser neodymium glass comprises, by mol, 50%-70% of P2O5, 1%-15% of Al203, 5%-25% of MO, 10%-20% of R2O, 0.5%-5% of R2O3 and 0.5%-5% of Nb2O5, wherein M in the MO is one or more of Ba, Mg and Zn; R in the R2O is one ore more of LI, Na and K, and R in the R2O3 is one or more of Y, La and Nd. According to the phosphate laser neodymium glass, all components are reasonably allocated, the non-linear refractive index n2 of the obtained phosphate laser neodymium glass is 1.16-1.24(10<-13>esu), the stimulated emission cross section sigma of the obtained phosphate laser neodymium glass is 4.0-4.8(10<-20>cm<2>), and the thermo-optical coefficient ds / dT(20-60 DEG C) of the obtained phosphate laser neodymium glass is 1-2 (10<-7> / K).

Description

technical field [0001] The invention relates to a phosphate laser neodymium glass, in particular to a laser glass with high stimulated emission cross-section, low thermo-optic coefficient and suitable for high-power laser devices. Background technique [0002] Neodymium glass is widely used in laser systems due to its long fluorescence lifetime, large stimulated emission cross-section, large pieces, and mass production. Neodymium glass also has a good energy storage effect and has become the preferred working material for high-power laser system amplifiers. For example, the ignition device of LLNL in the United States and the Shenguang device in my country all use neodymium glass as the amplification medium. The spectral properties of neodymium glass directly affect the design of high-power laser devices, so the study of spectral properties of neodymium glass is particularly important for the design of high-power laser devices. The spectral properties of neodymium glass inc...

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Problems solved by technology

[0005] At present, there are phosphate laser neodymium glasses in China, such as N31 glass (N31 laser neodymium glass acceptance report, December 1998), and its stimulated emission cross section is not high (3.9×10 -20 cm 2 ), its thermo-optic coefficient (dS / dT=14×10 -7 / K) is relatively large, which cannot meet the requirements of future high-power laser devices on the low thermo-optic effect of laser glass; the thermo-optic coefficient disclosed by CN 1765795A (dS / dT=0.3×10 -7 / K) is small, but its stimulated emission cross section is not high (3.9×10 -20 cm 2 )

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