Growth and spectroscopic properties of Er~(3+) /Yb~(3+) :LaCa_4O(BO_3)_3 crystals

摘要

This paper reports the growth and spectral properties of Er~(3+) /Yb~(3+) :LaCa_4O(BO_3)_3. The Er~(3+) /Yb~(3+) :LaCa_4O(BO_3)_3 crystal with diameter 30mm and length 40mm was obtained using the Czochralski method. The absorption and emission spectra of Er~(3+) /Yb~(3+) :LaCa_4O(BO_3)_3 crystal have been investigated. The strong absorption band with absorption coefficient 13cm~(-1) at 900-1050 nm was observed in Er_(0.05)/Yb_(0.5):Ca_4La_(0.45)O(BO_3)_3 crystal. The emission band in 1510-1580 was observed, and its fluorescence lifetime is about 1.22 ms at 300 K.