Title :
Gain measurement and upconversion analysis in Tm3+, Ho 3+ co-doped alumino-zirco-fluoride glass
Author :
Doshida, Minoru ; Teraguchi, Kazunari ; Obara, Minoru
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
fDate :
5/1/1995 12:00:00 AM
Abstract :
The small signal gain coefficients were measured in Tm3+,Ho3+ co-doped alumino-zirco-fluoride glass. A gain of 15%/cm at 2.05 μm was obtained for pump power density of 42 kW/cm2. The temperature increase of the glass was found to be more than 150 K with this pump power, which was estimated from a comparison between fluorescence intensities of Tm3+ 3 F4-3H6 and Ho3+ 5 I7-5I8. An upconversion rate constant of 12.5×10-17 cm3 sec-1 from a coupled (Tm3+ 3F4, Ho3+ 5I7) level to a coupled (Tm3+ 3H5, Ho3+ 5I6) level was determined by fitting the experimentally obtained gain coefficients to the calculated one which takes into consideration any temperature increase
Keywords :
aluminium compounds; barium compounds; fluorescence; holmium; lanthanum compounds; optical constants; optical glass; optical pumping; sodium compounds; solid lasers; thulium; zirconium compounds; 150 K; 2.05 mum; Ho3+ 5I7) level; Ho3+ 5I7-5I8 ; Tm3+ 3F4-3H6 ; Tm3+, Ho3+ co-doped alumino-zirco-fluoride glass; ZBLAN:Tm,Ho; ZrF4-BaF2-LaF3-AlF3-NaF:Tm,Ho; fluorescence intensities; gain measurement; pump power; pump power density; small signal gain coefficients; temperature increase; upconversion analysis; upconversion rate constant; Absorption; Equations; Fluorescence; Gain measurement; Glass; Laser noise; Laser radar; Optical materials; Stimulated emission; Temperature measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
