21 October 2016 Comparative study of DPAL and XPAL systems and selection principal of parameters
Author Affiliations +
Abstract
A theoretical model based on common pump structure is proposed to analyze the laser output characteristics of DPAL (Diode pumped alkali vapor laser) and XPAL (Exciplex pumped alkali laser) in this paper. The model predicts that an optical-to-optical efficiency approaching 80% can be achieved for continuous-wave four- and five-XPAL systems with broadband pumping which is several times of pumped linewidth for DPAL. Operation parameters including pumped intensity, temperature, cell’ s length, mixed gas concentration, pumped linewidth and output mirror reflectivity are analyzed for DPAL and XPAL systems basing on the kinetic model. The result shows a better performance in Cs-Ar XPAL laser with requirements of relatively high Ar concentration, high pumped intensity and high temperature. Comparatively, for Cs-DPAL laser, lower temperature and lower pumped intensity should be acquired. In addition, the predictions of selection principal of temperature and cell’s length are also presented. The conception of the equivalent “alkali areal density” is proposed in this paper. It is defined as the product of the alkali density and cell’s length. The result shows that the output characteristics of DPAL (or XPAL) system with the same alkali areal density but different temperatures turn out to be equal. It is the areal density that reflects the potential of DPAL or XPAL systems directly. A more detailed analysis of similar influences of cavity parameters with the same areal density is also presented. The detailed results of continuous-wave DPAL and XPAL performances as a function of pumped laser linewidth and mixed gas pressure are presented along with an analysis of influences of output coupler.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wei Huang, Wei Huang, Rongqing Tan, Rongqing Tan, Zhiyong Li, Zhiyong Li, Gaoce Han, Gaoce Han, Hui Li, Hui Li, "Comparative study of DPAL and XPAL systems and selection principal of parameters", Proc. SPIE 9990, High-Power Lasers 2016: Technology and Systems, 99900D (21 October 2016); doi: 10.1117/12.2241296; https://doi.org/10.1117/12.2241296
PROCEEDINGS
12 PAGES + PRESENTATION

SHARE
RELATED CONTENT

XPAL modeling and theory
Proceedings of SPIE (February 17 2011)
XPAL theory and modeling with comparison to experiments
Proceedings of SPIE (February 24 2012)
Exciplex pumped alkali laser (XPAL) modeling and theory
Proceedings of SPIE (November 15 2010)
Ti sapphire laser pumped 20at%Yb YAG thin chip with high...
Proceedings of SPIE (September 07 1999)

Back to Top