Samarium and ytterbium doped infrared absorption high aluminum silicate microcrystalline glass

Abstract

The invention provides a samarium and ytterbium doped infrared absorption high aluminum silicate microcrystalline glass. The filter tube glass comprises the following components by molar percentage: 40-50mol% of SiO2, 25-35mol% of Al2O3, 5-15mol%of MgO, 0-15mol% of ZnO, 0-5mol% of Li2O, 0-10mol% of TiO2, 0.5-2mol% of ZrO2, 0-5mol% of CeO2, 0.5-3mol% of Sm2O3, and 0-0.5mol% of Yb2O3. The glass has thermal conductivity of 1-1.2W / MK, and thermal expansion of the 50-60*10<-7> / K, and can realize absorption in the spectral range of 900-1600 nm through grinding, polishing, and microcrystalline heat treatment. The invention is expected to be used in neodymium glass and YAG laser system to obtain laser output with high frequency and high energy.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic optoelectronic information and functional materials, and relates to a high-aluminum silicate microcrystal doped with samarium and ytterbium, which is suitable for a repetition-frequency high-energy laser system and absorbs in the spectral range of 900-1600nm. Glass and method for its preparation. Background technique [0002] Repetition-frequency high-energy lasers have a wide range of application requirements in the fields of laser weapons, laser cleaning, laser shock strengthening, and titanium sapphire pump sources. The existing gain medium used in the repetition frequency high energy laser mainly includes Nd 3+ : YAG crystal and Nd-doped laser glass. [0003] At present, in high-energy laser devices, xenon lamp is still the most widely used pumping light source. Analysis of the emission spectrum of the xenon lamp and the absorption spectrum of the neodymium ion shows that the main outp...

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Problems solved by technology

Analysis of the emission spectrum of the xenon lamp and the absorption spectrum of the neodymium ion shows that the main output spectrum range of the xenon lamp is 400-1000nm, while the main absorption peaks of the neodymium ion are around 350nm, 530nm, 580nm, 750nm, 800nm ​​and 870nm, so the xenon lamp is at 875-1000nm. The emission spectrum of 1000nm will be mainly absorbed by the cooling liquid (water or other liquid) in the laser, which indirectly reduces the cooling efficiency of the cooling liquid on the gain medium; in addition, due to the Nd 3+ : The high stimulated emission cross-section of YAG crystal and neodymium-doped laser glass will form parasitic oscillations in large sizes, which will affect the laser efficiency. Therefore, it is also necessary to use materials with absorption at the laser wavelength on the side of the gain medium to suppress parasitic oscillations

[0004] At present, in the large-scale sheet-shaped high-power neodymium glass laser device, the copper-doped edge glass adopted suppresses its amplified spontaneous emission (CN101976796B, method for suppressing large-scale sheet-shaped laser neodymium glass amplified spontaneous emission; CN102875014B, laser glass In this system, the glass does not affect the pumping light path, so its absorption in the range of 550-1200nm does not affect the laser efficiency, but in the repetition frequency high-energy rod laser cavity, the glass will Absorb the emission spectrum of the xenon lamp at 550-875nm, thereby greatly reducing the laser efficiency; while in Nd 3+ : In the YAG crystal laser cavity, the samarium-doped isolating tubes of Schott and American kigre companies are currently used abroad. The glass is made of conventional lithium silicate glass. Although the thermal shock resistance can be improved through ion exchange, the manufacturing process Complicated, with limited strength improvement, the filter tube will burst under high repetition frequency and high energy pumping

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