A new model of laser-diode end-pumped actively Q-switched intracavity frequency doubling laser

Author

Yang, Kejian ; Zhao, Shengzhi ; Li, Guiqiu ; Zhao, Hongming

Author_Institution

Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan, China

Volume

40

Issue

9

fYear

2004

Firstpage

1252

Lastpage

1257

Abstract

The intracavity photon density and the initial population-inversion density are assumed to be Gaussian spatial distributions in the rate equations of a laser-diode end-pumped actively Q-switched intracavity-frequency-doubling laser. In addition, the influence of the pump rate, the thermal effect in the gain medium and the change of the photon density along the cavity axis have been taken into account. These coupled rate equations are solved numerically, and the dependences of pulse width, single-pulse energy and peak power on incident pump power are obtained for the generated-green-laser pulses. In the experiment, a laser-diode end-pumped actively Q-switched Nd:YVO₄/KTP laser with acoustic-optic-modulator is realized and the experimental results agree with the numerical solutions.

Keywords

Gaussian distribution; Q-switching; acousto-optical modulation; laser cavity resonators; neodymium; optical harmonic generation; optical pulse generation; optical pumping; population inversion; potassium compounds; semiconductor device models; solid lasers; surface emitting lasers; thermo-optical effects; titanium compounds; yttrium compounds; Gaussian spatial distributions; KTP:Nd; KTiOPO4:Nd; Nd:YVO₄/KTP laser; YVO₄:Nd; acoustic-optic-modulator; actively Q-switched laser; end-pumped laser; gain medium; green-laser pulses; intracavity doubling laser; intracavity frequency doubling; intracavity photon density; laser diode; laser model; pump rate; rate equations; thermal effect; Acoustic pulses; Frequency; Laser beams; Laser modes; Laser theory; Nonlinear equations; Optical pulse generation; Pump lasers; Solid lasers; Space vector pulse width modulation; -pumped; Actively $Q$-switched; Gaussian spatial distribution; LD; laser-diode; longitudinal distribution along the cavity axis; numerical solutions; rate equations;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2004.833227

Filename

1327774