Gradient doped laser transparent ceramic and preparation method thereof

Abstract

The invention provides gradient doped laser transparent ceramic and a preparation method thereof. Characteristics of an injection molding method are fully utilized, vacuum sintering is combined, the laser transparent ceramic with gradient doped rare earth elements is prepared, and 0.1at%-6at% gradient rare earth ion concentration of the laser transparent ceramic in the gradient direction is realized. Comprised with same-specification laser transparent ceramic with high concentration doped rare earth elements, the laser transparent ceramic with gradient doped rare earth elements has the advantages of good transparency; compared with same-specification laser transparent ceramic with low concentration doped rare earth elements, the laser transparent ceramic with the gradient doped rare earth elements is good in spectral property and has uniform laser output; with the preparation method, the gradient doped laser transparent ceramics of various complicated shapes can be prepared, which cannot be realized with other methods; meanwhile, simpleness in preparation technology is achieved, concentration gradient is easily controlled, slurry substrates are wide in application range, and low cost is achieved.

Description

technical field [0001] The invention belongs to the technical field of laser materials, and in particular relates to a gradient doped laser transparent ceramic and a preparation method thereof. Background technique [0002] Laser working substances have attracted much attention since the invention of lasers in the 1960s. The first laser invented by Mayman in the United States, the ruby ​​is excited by a strong light to emit laser light. Then, solid-state laser working materials gradually developed into glasses, single crystals and ceramics doped with excited elements. From the perspective of the substrate alone, the glass substrate can obtain large-sized samples, but its thermal conductivity is low, and it is difficult to prepare high-power lasers; the thermal conductivity of single crystal is higher than that of glass, but the growth cycle of single crystal is long and the preparation process is demanding. , the cost is expensive, and it is difficult to obtain high-qualit...

AI Technical Summary

Problems solved by technology

In 2003, T.Saiki of Japan Laser Technology Research Institute proposed to pass Cr 3+ doping to broaden the Nd 3+ The absorption spectrum; After that, K.Fujioka et al. 3+ Doped Cr 3+ ,Nd 3+ : YAG, 0.1%~10% Cr under 1% Nd doping 3+ Doping has done a series of studies and concluded that the fluorescence intensity is at 6%Cr 3+ or so reaches the highest, but at Cr 3+ After more than 1%, the fluorescence lifetime of the material begins to decline

[0005] In the existing laser transparent ceramics, all kinds of doped laser transparent ceramics have their own insurmountable defects

For example, Cr 3+ Loss of fluorescence lifetime by doping; Cr 3+ ,Nd 3+ : The laser uniformity of YAG laser transparent ceramics is relatively poor