Self-active laser crystal erbium calcium vanadate and preparation method thereof

Abstract

The invention discloses a self-activating laser crystal erbium calcium vanadate and a preparation method thereof, and relates to the artificial crystal field. A crystal pulling method is adopted to grow Ca9Er(VO4)7 crystal. The crystal belongs to an R3cH space group, the unit cell parameters as follows: a equals 10.855, c equals 37.967, Z equals 6, V equals 3874.62<3>, and the density is 3.43g / cm<3>. spectral test proves that the crystal has a strong absorption peak at 1515nm, the absorption coefficient of the absorption peak is 16.42cm<-1>, the half peak width thereof is 64nm, the absorption section thereof is 1.06*10<-20>cm<2>, and the crystal is suitable for pumping by a laser diode (LD). Furthermore, the crystal has a strong fluorescence emission peak at the wavelength of 1585nm, the half peak width of the fluorescence emission peak is 74nm, the fluorescence life time thereof is 3.79ms, and the crystal easily produce laser output with the wavelength of 1585nm. The self-activating laser crystal erbium calcium vanadate is applicable to a miniature laser as a microchip laser crystal.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic functional materials, in particular to a laser crystal material used as a laser working substance in a solid-state laser. Background technique [0002] Laser crystals are the core of solid-state lasers. They are composed of matrix materials and active ions. Their physical and chemical properties are mainly determined by the matrix materials, while their spectral characteristics and fluorescence lifetime are determined by the energy level structure of the active ions. Since the artificial ruby ​​pulse laser was successfully developed in 1960, hundreds of laser crystals have been discovered so far, but due to various reasons, there are only a dozen kinds of laser crystals that can really be used in practice. [0003] At present, the most widely used laser crystal is yttrium aluminum garnet (YAG) crystal doped with neodymium ions, which has good physical and chemical properties, and is easy to...

AI Technical Summary

Problems solved by technology

The world's first self-activated laser crystal was discovered in 1972 (H.G.Danielmeyer, H.P.Weber, J.Quant.Electro.QE-8(1972) 805.), and then a number of self-activated laser crystals were discovered, but due to They all have various defects and cannot be put into practical use

At present, the most famous self-activated laser crystal is neodymium aluminum borate crystal [NdAl 3 (BO 3 ) 4 , NAB], its laser experiment has been successful, but because of its non-identical melting, it is extremely difficult to obtain crystals with high optical quality, which limits its popularization and use