Visible and near infra-red up-conversion in Tm3+/Yb3+ co-doped silica fibers under 980 nm excitation.
The spectroscopic properties of Tm(3+)/Yb(3+) co-doped silica fibers under excitation at 980 nm are reported. Three distinct up-conversion fluorescence bands were observed in the visible to near infra-red regions. The blue and red fluorescence bands at 475 and 650 nm, respectively, were found to originate from the (1)G(4) level of Tm(3+). A three step up-conversion process was established as the populating mechanism for these fluorescence bands. The fluorescence band at 800 nm was found to originate from two possible transitions in Tm(3+); one being the transition from the (3)H(4) to (3)H(6) manifold which was found to dominate at low pump powers; the other being the transition from the (1)G(4) to (3)H(6) level which dominates at higher pump powers. The fluorescence lifetime of the (3)H(4) and (3)F(4) levels of Tm(3+) and (2)F(5/2) level of Yb(3+) were studied as a function of Yb(3+) concentration, with no significant energy back transfer from Tm(3+) to Yb(3+) observed.
Simpson
D A
DA
Centre for Telecommunications and Micro-Electronics, Optical Technology Research Laboratory, Victoria University, Victoria 8001, Australia.
Gibbs
W E
WE
Collins
S F
SF
Blanc
W
W
Dussardier
B
B
Monnom
G
G
Peterka
P
P
Baxter
G W
GW
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007259:Infrared Rays; D007834:Lasers; D008163:Luminescent Measurements / Q000295:instrumentation*; D008422:Materials Testing; D013932:Thulium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*
D013932:Thulium; D015018:Ytterbium