Observation of strongly nonquadratic homogeneous upconversion in Er/sup 3+/-doped silica fibers and reevaluation of the degree of clustering
1999 ◽
Vol 35
(11)
◽
pp. 1741-1749
◽
Keyword(s):
2019 ◽
Vol 37
(4)
◽
pp. 1091-1097
◽
2012 ◽
Vol 59
(6)
◽
pp. 527-532
◽