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Phosphate laser neodymium glass free of thermo-optic effect

A technology of thermo-optic effect and phosphate, which is applied in the field of phosphate laser neodymium glass, can solve the problems of low thermo-optic effect and large thermo-optic coefficient of laser glass, and achieve the best comprehensive performance, satisfy high-power laser devices, increase The effect of the stimulated emission cross section

Active Publication Date: 2018-11-20
CDGM GLASS LLC
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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), although the stimulated emission cross section is relatively high (3.9×10 -20 cm 2 ), but its thermo-optic coefficient (dS / dT=14×10 -7 / K) is relatively large, which cannot meet the requirements of future high-power laser devices for the low thermal and optical effects of laser glass

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Embodiment Construction

[0020] The technical route of the present invention is to realize ds / dT close to 0 by selecting phosphate glass with small refractive index temperature coefficient and large expansion coefficient; at the same time, by reducing the linear refractive index and dispersion of phosphate laser neodymium glass, it can reduce nonlinearity Refractive index n 2 The purpose is to increase the stimulated emission cross section of neodymium glass by increasing the commonly used components that can improve the emission cross section of neodymium ions, so as to achieve the best comprehensive performance of the material.

[0021] The temperature coefficient of the optical path length is:

[0022]

[0023] In formula (1), (n-1) and expansion coefficient α are positive numbers, and the refractive index of ordinary glass materials will increase when the temperature rises. It can be seen from formula (1) that in order to make ds / dT close to 0, it is necessary to make dn / dT a negative number. ...

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Abstract

The invention provides phosphate laser neodymium glass free of a thermo-optic effect. The phosphate laser neodymium glass free of the thermo-optic effect comprises the following components in molar percentage: 50-70mol% of P2O5, 3-25mol% of Al2O3, 5-25mol% of MO, 10-20mol% of R2O and 0.5-5mol% of R2O3, wherein the MO is one or more of BaO, MgO and ZnO; the R2O is one or more of Li2O, Na2O and K2O;the R2O3 is one or more of B2O3, Sb2O3 and Nd2O3. Through reasonable selection of the components and the contents thereof, a thermo-optic coefficient ds / dT is close to 0, the nonlinear refractive index n2 is reduced, the stimulated emission cross section of the neodymium glass is enlarged, and needs of a high-power laser device can be met.

Description

[0001] This application is a divisional application for an invention patent application with the application number 201410781664.6, the application date is December 16, 2014, and the title is "Phosphate Laser Neodymium Glass Without Thermo-optic Effect". technical field [0002] The invention relates to a phosphate laser neodymium glass, in particular to a laser glass suitable for high-power laser devices, which has high stimulated emission cross-section, low second-order nonlinear refraction index and no thermo-optic effect. Background technique [0003] The elimination of thermo-optic distortion is one of the main topics in the development of high-energy laser glass. Non-thermo-optic effect glass refers to the glass whose optical path length does not change with temperature, that is, the thermo-optic coefficient ds / dT is close to 0. Normally, when optical pumping is repeated to oscillate laser light, the temperature of the glass increases and the optical path length change...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/19C03C4/12
Inventor 莫大洪于天来苏学剑原保平
Owner CDGM GLASS LLC
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