Dysprosium-terbium-aluminum-doped yellow laser crystal as well as preparation method and application thereof

Abstract

The invention discloses a dysprosium, terbium and aluminum three-doped novel yellow laser crystal and a preparation method and application thereof, and relates to the field of laser crystal materials. The specific chemical formula is CaDyxTbyLa<1-x-y>AlzGa<3-z>O7, wherein x is greater than 0 and less than or equal to 0.05, y is greater than 0 and less than or equal to 0.01, and z is greater than 0 and less than or equal to 0.6; in the crystal material, Dy3+ ions are used as active ions to realize yellow light emission at a wave band of 560-600 nm, and the corresponding energy level transition is Dy3+: 4F9 / 2 to 6H13 / 2; Tb3+ is used as a deactivating ion to accelerate the relaxation speed of the Dy3+ laser lower energy level 6H13 / 2, so the radiation lifetime of the laser lower energy level is effectively reduced, and the rapid inversion distribution of the population is realized; Al3+ ions are used as non-optically active ions, so that a mixed crystal local disordered structure is formed, the disordered degree of the crystal is increased, a Dy3+ multi-luminescence center is regulated and controlled, and an effect of widening a luminescence spectrum line is achieved. Based on the novel dysprosium, terbium and aluminum three-doped crystal, all-solid-state yellow laser output of Dy3+ ions is realized.

Description

technical field [0001] The invention relates to the field of inorganic crystal materials, in particular to a yellow laser crystal doped with dysprosium, terbium and aluminum, its preparation method and application. Background technique [0002] Yellow laser (wavelength range 560-600 nm) has very important application prospects in the fields of biomedicine, space target detection and recognition, atom cooling and capture, lidar, laser display and military, especially in ophthalmology diagnosis and treatment . At present, laser output in visible light bands such as red, green, and blue can be obtained through nonlinear frequency conversion technology with high conversion efficiency. However, yellow laser cannot be directly pumped by laser diode (LD) due to the lack of corresponding fundamental frequency light. accomplish. Consequently, the development of yellow lasers has been very slow over the past few decades. In recent years, due to the huge promotion of the LED lightin...

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