Abstract

A novel BaY2F8 crystal doped with thulium ions is grown and extensively investigated. Owing to the large number of vibronic levels and to a favorable electron–phonon coupling, extremely wide absorption and emission bands around 1.9μm are observed. A room-temperature Tm:BaY2F8 laser tunable over a 210-nm interval, from 1849to2059nm, is demonstrated.

© 2005 Optical Society of America

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