Spectroscopic characterization of a Tm3+:SrGdGa3O7 crystal |
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| Authors: | W Ryba-Romanowski S Gołvab I Sokólska G Dominiak-Dzik J Zawadzka M Berkowski J Fink-Finowicki M Baba |
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| Institution: | (1) Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland, PL;(2) Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland, PL;(3) Department of Electrical and Electronic Engineering, Faculty of Engineering, Iwate University, Morioka 020, Japan, JP |
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| Abstract: | 3 O7 crystal have been recorded at room temperature and at approximately 8 K. Room-temperature luminescence lifetimes of 1D2, 1G4, 3H4, and 3F4 states have been measured for Tm concentration ranging from %at.]0.5 to %at.]9. Based upon these data the crystal field
splitting of luminescent states has been derived and radiative transitions rates have been evaluated. Strong self-quenching
of luminescence originating in the 1G4 and 3H4 states has been found in this activator–host combination. Peak emission cross section of the potential laser transition at
1800 nm was determined to be 3.9×10-21 cm2 and the gain coefficient versus wavelength was estimated and discussed.
Received: 14 April 1998/Revised version: 10 August 1998 |
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| Keywords: | PACS: 78 55 Hx 42 70 Hj |
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