31 results about "Yttrium lithium fluoride" patented technology

The invention discloses an Er<3+> / Pr<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+> / Pr<3+> co-doped monocrystal; and the molecular formula is LiY(1-x-y)ErxPryF4, wherein x is greater than or equal to 0.010 and less than or equal to 0.085, and y is greater than or equal to 0.0001 and less than or equal to 0.008. The yttrium lithium fluoride monocrystal has the advantages of high emission efficiency of fluorescence of 2.7 microns and high transmittance in intermediate infrared ray, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+> / Pr<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.

The invention discloses a Ho<3+> / Pr<3+> codoping lithium yttrium fluoride monocrystal and a preparation method thereof. The lithium yttrium fluoride monocrystal is a rare-earth iron Ho<3+> / Pr<3+> codoping monocrystal; the molecular formula of the lithium yttrium fluoride monocrystal is LiY(1-x-y)HoxPryF4, wherein x is more than and equal to 0.004 or less than and equal to 0.08, and y is more than and equal to 0.0002 or less than and equal to 0.01. The lithium yttrium fluoride monocrystal disclosed by the invention has the characteristics of high efficiency of 2.9 mu m fluorescence emission, high intermediate-infrared transmittance, more excellent thermotic, mechanical and chemical stability compared with those of a glass-state material, low phonon energy, high optical transmissibility at a 300-5500 nanometer broadband, small color center forming amount, low thermal lens effect, and the like, and is easier to process and more suitable for a laser device. The preparation method disclosed by the invention adopts a sealing crucible descent method technology, is easy to operate, carries out high-temperature fluorination treatment on a raw material and obtains the high-quality Ho<3+> / Pr<3+> codoping LiYF4 monocrystal almost without -OH ions or oxides by insulating the monocrystal from air and vapors in the growing process by adopting a water-insulated oxygen-insulated sealing environment.

A polygonal crystal for a solid laser comprises a laser crystal 1 and bonded crystals 2 located at both ends of the laser crystal 1, wherein the laser crystal 1 and the bonded crystals 2 have regularly pentagonal cross sections; the laser crystal 1 uses one of a neodymium-doped yttrium lithium fluoride crystal, a thulium-doped yttrium lithium fluoride crystal, a thulium-holmium-codoped yttrium lithium fluoride crystal, and a holmium-doped yttrium lithium fluoride crystal; the bonded crystals 2 are yttrium lithium fluoride crystals. The polygonal crystal and an all-solid-state laser of the invention use the regularly pentagonal laser crystal and the bonded crystals made of the yttrium lithium fluoride material, suppress the generation of self-oscillation in the crystal to the utmost extentby using side pumping, and realize high-energy high-efficiency laser output.