Optical absorption spectra and energy levels of Er3+ ions in glassy lithium tetraborate matrix

摘要

The optical absorption spectra of Er:Li2B4O7 glasses are studied in the range 200-800 nm. The lines corresponding to the direct f-f parity-forbidden intraconfigurational transitions from the ground (4) I (15/2) state to the levels of the excited (4) F (9/2), (4) S (3/2), (2) H (9/2), (2) H (11/2), (4) F (7/2), (4) F (5/2), (4) F (3/2), (2) H (9/2), (4) G (11/2), (4) D (3/2), (4) D (1/2), and (2) D (3/2) states are found.