L. N. Zhaoa, *, J. Liua, Y. Yuanb, X. P. Hub, G. Zhaob, Z. D. Gaoc, and S. N. Zhub
a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
b National Laboratory of Solid State Microstructures and School of Physics, Nanjing University,
Nanjing 210093, China
c College of Science, Northeastern University, Shenyang 110004, China
*e-mail: zhaolina1205@163.com, lnzhao@sdnu.edu.cn
Received September 29, 2011; in final form, September 30, 2011; published online February 6, 2012
Abstract—We present a high power red-green-blue (RGB) laser light source based on cascaded quasi-phase-
matched wavelength conversions in a single stoichiometric lithium tantalate. The superiority of the experimen-
tal setup is: the facula of the incident beam is elliptical to increase interaction volume, and the cavity was an
idler resonant configuration for realizing more efficient red and blue light output. An average power of 2W of
quasi-white-light was obtained by proper combination of the RGB three colors. The conversion efficiency for
the power of the quasi-white-light over pump power reached 36%. This efficiency and powerful RGB laser light
source has potential applications in laser-based projection display et al.
DOI: 10.1134/S1054660X12030292
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