Title :
Photon avalanche upconversion in Er3+:YAlO3
Author_Institution :
RDT&E Div., Naval Command Control & Ocean Surveillance Centre, San Diego, CA, USA
fDate :
2/1/1995 12:00:00 AM
Abstract :
The results of an investigation of photon avalanche upconversion pumping in Er3+:TiAlO3 are reported. Five pump wavelengths corresponding to transitions from the metastable 4I13/2 state to the 2H11/2 state generated upconversion laser emission at 549.8 nm. The dependence of the laser output power on pump power near laser threshold is discussed in terms of a four-level kinetics model and is shown to reflect the threshold power requirement for photon avalanche. The maximum output power at 7 K was 33 mW, giving an optical conversion efficiency of 3.5% and a conversion efficiency of 28% based on absorbed power. Pumping Er:YALO by cross relaxation energy transfer produced 166 mW of laser output with an optical conversion efficiency of 17%
Keywords :
erbium; laser transitions; optical frequency conversion; optical pumping; solid lasers; 166 mW; 17 percent; 28 percent; 3.5 percent; 33 mW; 549.8 nm; 7 K; Er:YALO; Er3+:YAlO3; YAlO3:Er; cross relaxation energy transfer; four-level kinetics model; metastable state; optical conversion efficiency; output power; photon avalanche upconversion pumping; threshold power; transitions; upconversion laser emission; visible laser; Erbium; Kinetic theory; Laser excitation; Laser modes; Laser transitions; Metastasis; Optical pumping; Power generation; Power lasers; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
