NaYF<sup>4</sup>:Er<sup>3+</sup>,Yb<sup>3+</sup>crystals were prepared by simple synthetic method. Under 980nm laser excitation, 408nm, 539nm and 655nm upconversion signals were recorded. Laser power and signal intensities of the upconverted emissions were obtained to understand the upconversion mechanisms.
© 2009 APS
D. N. Patel, C. Vance, N. King, M. Jessup, L. Green, and S. Sarkisov, "Strong Visible Upconversion in Rare Earth Ion-Doped NaYF<sup>4</sup>Crystals," in Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, OSA Technical Digest (CD) (Optical Society of America, 2009), paper JWC13.
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