Mixed lanthanide-magnesium aluminates and lasers using monocrystals of these aluminates
US4902654A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 16, 1987 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jun 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B15/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Mixed lanthanide-magnesium aluminates and lasers using monocrystals of these aluminates. These lasers in particular incorporate two flash lamps for longitudinally pumping a monocrystalline rod of a magnetoplumbite-aluminate emitting visible or infrared light, amplified between a mirror, a polarizing prism being used for passing to the outside of the laser the amplified light beam. The aluminate is of formula: EQU (La.sub.1-x Tr.sub.x).sub.1-y-v Mg.sub.1-z-t Al.sub.11-u+y+2z/3 Cr.sub.u O.sub.19-t-3v/3. in which Tr represents a) at least one single trivalent substance chosen from among lanthanides, Y.sup.3+, Sc.sup.3+, or b) at least one pair of lanthanides formed from a divalent element and a trivalent element, while retaining the electrical neutrality by adding aluminium or oxygen deficiencies, or any combination of (a) and (b); x is a number such that 0.ltoreq.x<1; y and v are numbers such that 0.ltoreq.y+v.ltoreq.0.4; z and t are numbers such that 0.ltoreq.z+t<1, provided that when z=t=0, y+v is .noteq.0 for Tr representing a single trivalent lanthanide; u is a number between 0 and 2, provided that when Tr represents Y.sup.3+ or Sc.sup.3+ u is .noteq.0, that when x=0 u is .noteq.…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.