Open Access1.5-µm-band thulium-doped microsphere laser originating from self-terminating transition
Author(s) -
Jianfeng Wu,
Shibin Jiang,
N. Peyghambarian
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.010129
Subject(s) - laser , materials science , thulium , optics , slope efficiency , population inversion , wavelength , doping , fiber laser , optoelectronics , physics
Continuous-wave 1.5-microm-band laser is demonstrated in thulium doped tellurite glass microsphere by single laser pumping. 1.9-microm laser from the lower transition (3F4->3H6) of Tm3+ is generated to depopulate the lower level (3F4) of 1.5-microm transition (3H4->3F4) in order to achieve the population inversion. Laser wavelength of 3H4->3F4 transition is shifted by 30 nm from the emission peak. Slope efficiency of 1.9-microm laser is improved after the1.5-ìm laser starts to lase.