Room temperature CW laser efficiency of Yb(sup 3+-)Er(sup 3+) and Tm(sup 3+) doped silicates in the infrared region

摘要

This paper reports the main spectroscopic characterizations and laser experiments carried out on two new crystal hosts: the yttrium orthosilicate Y(sub 2)SiO(sub 5) and the silicate oxyapatite Sr(sub 2)Y(sub 8)(SiO(sub 4))(sub 6)O(sub 2) (hereafter noted SYS), doped with Ytterbium and Erbium for a 1,55 (mu)m laser emission and with Thulium for a 2 (mu)m emission. Four new laser lines have been demonstrated at 1,554 (mu)m, 1,576 (mu)m, 1,99 (mu)m and 2,05 (mu)m for respectively Yb,Er:SYS; Yb,Er:Y(sub 2)SiO(sub 5); Tm:SYS and Tm:Y(sub 2)SiO(sub 5). If for the Yb,Er codoped materials laser performances are still poor compared with the Yb,Er phosphate glass, the Tm doped materials exhibit laser performances similar to the Tm:YAG and look very promising. (authors). 7 refs., 4 figs., 4 tabs. (Atomindex citation 27:020945)