Abstracts 1997

Abstract of Publication No. 284

M. F. Hazenkamp, H. U. Güdel, S. Kück, G. Huber, W. Rauw and D. Reinen
Excited state absorption and laser potential of Mn5+-doped Li3PO4
Chem. Phys. Lett. 265, 264-270 (1997)      Full Text (PDF)      DOI-Link     

Abstract: Excited state absorption (ESA) spectra at room temperature of Mn5+-doped Li3PO4 crystals are reported. A broad and strong (sESA 1 × 1018 cm2) ESA band due to the 1E 1T1 and1 E 1T2 transitions is observed between 10000 and 15000 cm1 which prevents efficient near-infrared pumping for laser operation. For Mn5+-doped Li3PO4 there is no ESA at the stimulated-emission wavelength, in contrast to the laser material Sr5(VO4)3F:Mn5+. This is due to the higher crystal field strength D and the weaker distortion of the host tetrahedron in Li3PO4. Finally, the laser potential of Mn5+-doped materials, in general, is evaluated.

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