Edge-covered glass for neodymium-doped phosphate laser glass integrated edge covering and preparation method

Abstract

The invention discloses an edge-covered glass for neodymium-doped phosphate laser glass integrated edge covering and a preparation method thereof. The edge-covered glass comprises the following components in mole ratio: 58-62 mol% of P2O5, 8-12 mol% of Al2O3, 12-16 mol% of K2O, 4-6 mol% of Na2O, 8-12 mol% of BaO and 1-2 mol% of La2O3, and Cu < 2 + > for absorbing spontaneous amplification radiation (ASE) and inhibiting parasitic oscillation (PO) is added in the form of CuO, and the content is 1wt% of the total amount of the formula. The expansion curve, Tg and Tf of the edge-covered glass are close to or even equal to those of N31 type neodymium-doped phosphate laser glass, so that residual stress caused by the factor is reduced or even eliminated, the bonding strength of the integrated covered edge is higher, and meanwhile, the refractive index of the edge-covered glass is adjusted to be close to or equal to that of the neodymium-doped phosphate laser glass; therefore, residual reflection caused by refractive index difference is reduced; the N31 type neodymium-doped phosphate laser glass subjected to integrated hard edge covering can meet engineering application and has practical significance, and the engineering application requirement of a high-power solid laser system is met.

Description

technical field [0001] The invention relates to laser glass, in particular to an edge-wrapping glass used for integrated edge-wrapping of neodymium-doped phosphate laser glass and a preparation method thereof. Background technique [0002] High-power solid-state laser systems mainly use flaky Nd-doped phosphate laser glass as the gain medium, but amplified spontaneous emission (Amplified Spontaneous Emission, ASE) and parasitic oscillations (Parasitic Oscillations, PO) are generated in the flake Nd-doped phosphate laser glass. , affecting the energy storage efficiency and laser output capability of the system. At present, the main method to suppress ASE and PO is to wrap the Nd-doped phosphate laser glass, that is, to equip the side of the sheet-shaped Nd-doped phosphate laser glass perpendicular to the optical path with a medium that absorbs ASE and PO. The flake Nd-doped phosphate laser glass is generally in the shape of a rectangular sheet or an oval sheet, and the recta...

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Problems solved by technology

The flake Nd-doped phosphate laser glass is generally in the shape of a rectangular sheet or an oval sheet, and the rectangular sheet is generally wrapped by polymer bonding and wrapping technology. [ 1: Howard T. Powell, Michael o. Riley, Charles R. Wolfe, et al. Composite polymer glass edge for laser disks [P]. U.S. English, 4849036, July 18, 1989; 2: T. Meng, J. Tang, J .Hu et al.Edge cladding technology to suppress the amplified stimulated emission(ASE)of the laser disks[P],Chinese Patent ZL201010273819.7,October 27,2013 ] , there is a problem that the Nd-doped phosphate laser glass wrapped with organic polymer cannot withstand the thermal shock of high-power working conditions, nor can it work in the cooling medium under high-power conditions

Elliptical flakes generally use coating sintering wrapping technology [ 3: Hisayoshi Toratani, Hidakamachi.Edge-cladding glass of disc laser glass:us4217382[p].1980-08-12; 4:Alexander J.Marker.Cladding glass ceramic for usein high powered lasers:us 5718979[p].1998 -02-17;5: S E Stokowski, S M Yarema, IF Stowers. Edge Cladding, Laser Program Annual Report 1980, Vol(1): p214-217 ] , but the coating and wrapping technology is mainly applied to N21 type Nd-doped phosphate laser glass ellipse, and there are a lot of bubbles, defects and carbides on the wrapping interface after coating and sintering, which will increase the residual reflection (about 0.1×10 -2 ~25×10 -2 range) that affect the ability to suppress ASE and PO

For the new generation of N31 Nd-doped phosphate laser glass, its T g T of 450°C than N21 g 550°C is about 100°C lower, and the corresponding sintering temperature needs to be lowered, so the coated edged glass powder will be incompletely sintered and there is a risk of stress cracking, and the refractive index of N31 is lower than that of N21. Therefore, based on this, only the N31 Nd-doped phosphate laser glass ellipse can be integrated, that is, the side of Nd-doped phosphate laser glass polished, and at t g Keep warm at around the temperature, then pour the molten edged glass melt into the side of the laser neodymium glass, and then anneal and cool down

At present, there is no edging glass specially applied to the integrated edging of N31 Nd-doped phosphate laser glass, and the edging glass of both polymer edging technology and coating sintering edging technology and N31 Nd-doped phosphate laser glass The expansion curve of glass, T g , T f And the refractive index does not match, so it is necessary to develop a wrapping glass suitable for its integrated wrapping according to the characteristics of N31 neodymium-doped phosphate laser glass

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