Optimization of the peak power of doubly Q-switched lasers with both an acousto-optic modulator and a GaAs saturable absorber
✍ Scribed by Zhenshan Cui; Dechun Li; Shengzhi Zhao; Jing An; Ming Li; Jian Liang; Wei Wang
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 339 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
The key parameters of an optimally coupled doubly Q-switched laser are determined by maximizing the peak power. A group of general curves are generated by considering the single-photon absorption (SPA) and two-photon absorption (TPA) processes in the GaAs, along with the Gaussian spatial distributions of the intracavity photon density, the initial population-inversion density and the influence of the acoustooptic (AO) Q-switch. These results are compared with the results obtained when maximizing the output energy of the doubly Q-switched laser, and the differences between these approaches are discussed. Sample calculations for a laser-diode-pumped Nd 3+ :YVO 4 laser with both an AO modulator and a GaAs saturable absorber are presented to demonstrate the use of the curves and the relevant formulas.