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Pulse Width Reduction in Diode-Pumped Nd:GdVO 4 Laser with AO and GaAs Double Q-Switches

2005; Institute of Physics; Volume: 44; Issue: 5R Linguagem: Inglês

10.1143/jjap.44.3017

1347-4065

Guiqiu Li, Shengzhi Zhao, Kejian Yang, Wei Wu,

Photonic Crystal and Fiber Optics

By considering the Gaussian spatial distribution of the intracavity photon density, we introduce the rate equations of a diode-pumped Nd:GdVO 4 laser doubly Q-switched by acoustic-optic (AO) modulator and GaAs saturable absorber. These rate equations are solved numerically, and the dependence of pulse width on incident pump power is obtained. Meanwhile, a diode-pumped doubly Q-switched Nd:GdVO 4 laser with AO and GaAs is realized. This laser can generate a shorter and more symmetric pulse when compared with purely AO and passive Q-switching. The experimental results are in agreement with the theoretical calculations.