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Spectroscopy of the Laser Ion Mn5+ in Sr5(VO4)3F

Published online by Cambridge University Press:  15 February 2011

Larry D. Merkle
Affiliation:
IR OPTICS TECHNOLOGY OFC, ARMY RESEARCH LABORATORY, 10235 BURBECK RD STE 110, FT BELVOIR VA 22060-5838
Bruce H. T. Chai
Affiliation:
CREOL, U. of Central Florida, 12424 Research Parkway, Orlando, FL 32836
Yannick Guyot
Affiliation:
Guyot Research Associates, Rue Franche, 42370 St. Andre d'Apchon, France
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Abstract

Mn5+:Sr5(VO4)3F is a new laser material with spectroscopic and laser properties similar to those of other recently reported Mn doped vanadates, but with the advantage of easier crystal growth. It has strong, broad absorption bands from 600–1000 nm and a sharp emission peak at 1164 nm. The splittings and polarization dependence of the spectra are consistent with the approximate C3v site symmetry reported for other apatites. Despite relatively large distortion from tetrahedral symmetry, the 1E and 3T2 states remain sufficiently separate that the emission is almost purely from the 1E state. As a result, laser operation is of the three-level type. Single pass gain/loss measurements indicate that any excited state absorption at the laser wavelength must be significantly smaller than the stimulated emission.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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Spectroscopy of the Laser Ion Mn5+ in Sr5(VO4)3F
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