Title :
Analysis of a dynamical procedure on diode-end-pumped solid-state lasers
Author :
Xie, Wenjie ; Tam, Siu-Chung ; Lam, Yee-Loy ; Lai, Kin ; Wu, Ruifen ; Lim, Yuan ; Lau, Ernest
Author_Institution :
Nanyang Technol. Univ., Singapore
fDate :
10/1/2001 12:00:00 AM
Abstract :
For solid-state lasers, we have determined that the overlap integrals Vth, related to the threshold pump power, and Vslope, related to the laser slope efficiency, dynamically change with pump power. The increase of diffraction loss is also caused by the dynamical change of the laser mode size, which alters the Fresnel number of the cavity. Subsequently, the threshold pump power and the laser slope efficiency also change dynamically. The dramatic increase of the laser mode radius at the laser crystal and the sudden decrease of the laser mode radius at the output mirror when operating near the stability limit make the laser output suddenly drop. A longer cavity will have a larger threshold pump power and a smaller total output power
Keywords :
laser cavity resonators; laser modes; laser stability; laser theory; light diffraction; neodymium; optical losses; optical pumping; solid lasers; thermo-optical effects; Nd:YAG laser; YAG:Nd; YAl5O12:Nd; cavity Fresnel number; diffraction loss; diode-end-pumped solid-state lasers; dynamical procedure; laser mode radius; laser mode size; laser slope efficiency; output mirror; overlap integrals; pump power; space dependent rate equations; stability limit; thermal focal length; thermal lensing; threshold pump power; total output power; Diffraction; Diodes; Laser excitation; Laser modes; Laser stability; Laser transitions; Power lasers; Pump lasers; Solid lasers; Solid state circuits;
Journal_Title :
Quantum Electronics, IEEE Journal of
