Process for increasing laser crystal fluorescence yield by contr

Details Process for increasing laser crystal fluorescence yield by contr Process for increasing laser crystal fluorescence yield by contr

1979-03-05

1982-02-16

Edmundson, F.

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

423263, 423 211, C09K 1146, C01F 1700

Patent

active

043158323

ABSTRACT:
The specification discloses a process for modifying the environment of active atoms in a selected material by removing impurities from the environment. The material is heated at an elevated temperature in an atmosphere conducive to the formation of atomic oxygen so that the atomic oxygen can react with the atoms and molecules in the environment to remove the impurities in and thus alter selected properties of the material. In a preferred embodiment of the present invention, the lasing efficiency of a neodymium-doped yttrium aluminum garnet crystal is increased by heating the crystal at an elevated temperature in an atmosphere conducive to the formation of atomic oxygen so that the atomic oxygen can react with and remove impurities from the crystal to diminish the color center concentration therein and thus increase the fluorescence yield and lasing efficiency of the crystal.

REFERENCES:
patent: 3723599 (1973-03-01), Brandle et al.
patent: 4013501 (1977-03-01), Van Uitert et al.
patent: 4030949 (1977-06-01), Horikoshi et al.
Robbins et al., Physical Reviews, vol. 19, No. 2, pp. 1254-1269, Jan. 1979.
Robbins et al., J. Electrochem. Soc., vol. 126, No. 7, pp. 1221-1227, Jul. 1979.
Robbins et al., J. Electrochem. Soc., vol. 126, No. 9, pp. 1556-1563.

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