Cerium activated colquirite laser crystal

Details Cerium activated colquirite laser crystal Cerium activated colquirite laser crystal

1996-10-25

1998-12-22

Scott, Jr., Leon

Coherent light generators

Particular active media

Insulating crystal

372 39, H01S 316

Patent

active

058526234

ABSTRACT:
A laser crystal for a solid state laser with tunable emission in the ultraviolet wavelength region. The crystal is of trivalent cerium cations activated (doped) into the colquiriite crystal structures, such as LiCaAlF.sub.6 (LiCAF) and LiSrAlF.sub.6 (LiSAF). The crystal is grown along a well-defined axis by seeded crystal growth techniques to provide starting material which is fabricated along the preferred polarization direction with high yields. A primary crystal growth issue for cerium activated colquiriites is the charge compensation mandated by the substitution of the trivalent cerium ion for divalent strontium, which is located in the only site large enough to support the cerium cation. Charge compensation with monovalent or divalent cations is utilized to optically stabilize the colquiriite crystal and produce a solid state laser host which is less susceptible to color center or optically-induced defect formation during the ultraviolet lasing or ultraviolet excitation mechanisms.

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