Title :
Er3+:YAlO3 upconversion laser
Author_Institution :
RDT&E Div., Naval Command, Control, & Ocean Surveillance Center, San Diego, CA, USA
fDate :
12/1/1994 12:00:00 AM
Abstract :
Upconversion lasing in Er:YAlO3 is reported. Laser emission was produced using both sequential two-step pumping and cross-relaxation energy transfer. In addition, photon avalanche upconversion pumping was demonstrated. Selection among these pumping mechanisms is determined by the pump wavelength, and laser operation was obtained with excitation between 785 nm and 840 nm. The highest laser output power was achieved at 34°K, where 918 mW of pump power at 807 nm produced 121 mW of TEM00 emission. The optical conversion efficiency was 13%. Repetitively Q-switched operation is reported, and the temporal- and temperature-dependence of the laser output is discussed
Keywords :
Q-switching; erbium; laser modes; optical frequency conversion; optical pumping; solid lasers; yttrium compounds; 121 mW; 13 percent; 34 K; 785 to 840 nm; 807 nm; 918 mW; Er3+:YAlO3 upconversion laser; TEM00 emission; YAlO3:Er; cross-relaxation energy transfer; laser emission; laser operation; laser output; laser output power; optical conversion efficiency; photon avalanche upconversion pumping; pump power; pump wavelength; pumping mechanisms; repetitively Q-switched operation; sequential two-step pumping; temperature-dependence; temporal-dependence; upconversion lasing; Absorption; Energy exchange; Erbium; Laser excitation; Laser transitions; Optical pumping; Power generation; Power lasers; Pump lasers; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
