Wang, J., Mwarania, E.K., Lincoln, J.R., Feuchter, T., Brocklesby, W.S., Croudace, I.W., Payne, D.N. and Wilkinson, J.S.
Fluorescent lifetime of Er3+ 3I13/2 level in BK-7 borosilicate glass
Materials Letters, 14, .
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It is established that the B3+ ions exist only in the form of [BO4] units in BK-7 borosilicate glass. This limits the maximum vibrational energy at peak to 1200 /cm rather than 1400 /cm, as is found in borate glasses, and explains the long lifetime of the Er3+ 4 I (13/2) level observed in BK-7 borosilicate glass.
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