Abstract
This work reports the intense emissions at 2.7 and 2.84 μm in a -codoped fluoride glass (). An extensive transmission spectrum and the absence of strong absorption guarantee the observation of mid-infrared (IR) emissions. For the -codoped sample, the 2.7- and 2.84-μm emissions are 5.8 and 3.8 times higher with larger emission cross-sections ( and ), respectively. Meanwhile, other near to middle infrared emissions (1200, 2045 nm emissions from and 980, and 1535 nm emissions from ions) are all enhanced. The collective enhanced effect originates from the disappearance of nonradiative decay processes after codping and ions. Hence, the advantageous spectroscopic characteristics of -codoped ZBYA glass indicate that this kind of fluoride glass may be an attractive host to develop solid-state lasers for 3 μm.
© 2014 Optical Society of America
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