Excited-State Upconversion of Pr(0.5)Yb(1.5):ZBLAN under Two-Colour Excitation
CHEN Xiao-Bo1, SONG Zeng-Fu1
1Applied Optics Beijing Area Major Laboratory, Analytical and Testing Center, Beijing Normal University, Beijing 100875
2School of Physics, Peking University, Beijing 100871
Excited-State Upconversion of Pr(0.5)Yb(1.5):ZBLAN under Two-Colour Excitation
CHEN Xiao-Bo1;SONG Zeng-Fu1
1Applied Optics Beijing Area Major Laboratory, Analytical and Testing Center, Beijing Normal University, Beijing 100875
2School of Physics, Peking University, Beijing 100871
Abstract： We report the excited-state upconversion in Pr(0.5)Yb(1.5):ZBLAN under two-colour excitation of 960nm laser and xenon lamp light. Three obvious upconversion excitation peaks around 856.0, 804.2 and 787.1nm were observed and the involved mechanism has been explained. The measured upconversion excitation peak 856.0nm corresponds to the sum of theoretical values 852nm and 866nm owing to the 1G4(Pr3+)→ 1I6(Pr3+) and 1G4(Pr3+)→ 3 P1(Pr3+) excited state absorption transitions. The measured 804.2 and 787.1nm upconversion excitation peaks originate from the excited state absorption transitions 3+H6(Pr3+)→ 1D2(Pr3+) and 1G4(Pr3+)→ 3+P2(Pr3+), respectively. The excited state absorption upconversion 1G4(Pr3+)→ 1I6(Pr3+) is strong because of its large oscillator strength f=23.040×10-6.
2005, Vol. 22 
