Open AccessDiode-pumped doubly passively Q-switched Cr,Nd:YAG/KTP green laser with GaAs saturable absorber
Author(s) -
Guiqiu Li,
Shengzhi Zhao,
Kuo Yang,
Dechun Li,
Houwen Yang
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.004713
Subject(s) - saturable absorption , optics , q switching , materials science , rate equation , laser , diode , pulse (music) , population inversion , laser beam quality , optoelectronics , physics , laser beams , fiber laser , detector , quantum mechanics , kinetics
A diode-pumped doubly passively Q-switched Cr,Nd:YAG/KTP green laser with GaAs saturable absorber is realized for the first time to our knowledge. This laser can generate a more symmetric and shorter pulse when compared with the self-Q-switched Cr,Nd:YAG/KTP green laser. A symmetry factor is defined to describe the temporal symmetry of the pulses. At an incident pump power of 4.1W, a pulse symmetry factor as high as 0.995 is obtained. A rate equation model is introduced to theoretically analyze the results obtained in the experiment, in which the spatial distributions of the intracavity photon density, the pump beam and the population-inversion density are taken into account. The numerical solutions of the rate equations are in good agreement with the experimental results.