Abstract

Nd<sup>3+</sup> strengthens the Er<sup>3+</sup>:2.7-μm emission 10<sup>4</sup> times in fluorophosphate glass; in addition, it can also decrease its upconversion effects and the 1.5-μm emission accordingly. Cross-relaxation process is the principal transition mechanism in this codoping system. Compared with Er<sup>3+</sup> singly doped glass, J-O parameters along with the A<sub>rad</sub>, β, τ<sub>R</sub> values of Er<sup>3+</sup> change markedly in Er<sup>3+</sup>:Nd<sup>3+</sup> codoped glass because Nd<sup>3+</sup> greatly influences the local environment around Er<sup>3+</sup>. Results also show that Nd<sup>3+</sup> has a good <sup>4</sup>I<sub>13/2</sub> lifetime quenching effect as well as thermal load reduction ability for Er<sup>3+</sup>:2.7-μm emission.

© 2011 Chinese Optics Letters

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