Up-conversion photoluminescence characteristics of Yb
3+
:Er
3+
:Tm
3+
co-doped borosilicate glasses
Keyword(s):
2013 ◽
Vol 74
(3)
◽
pp. 410-417
◽
Keyword(s):
2019 ◽
Vol 513
◽
pp. 167-182
◽