Mixed lanthanide-magnesium aluminates and lasers using monocryst

Details Mixed lanthanide-magnesium aluminates and lasers using monocryst Mixed lanthanide-magnesium aluminates and lasers using monocryst

1989-04-12

1990-10-09

Scott, Jr., Leon

Coherent light generators

Particular active media

Insulating crystal

2523014R, H01S 316

Patent

active

049625047

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 magnetoplumbito-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: (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 aluminum 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=O, 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.0 and that when u=0 x is .noteq.0.

REFERENCES:
patent: 4606846 (1986-08-01), Kahn et al.
patent: 4664849 (1987-05-01), Farrington et al.
Kahn et al., "Preparation, Structure, Optical, and Magnetic Properties of Lanthanide Aluminate Single Crystals (LnMAl.sub.11 O.sub.19)"; Jour. of Appl. Phys. 52 (11), Nov., 1981.

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