A new dye, <i>trans</i>-4-[<i>p</i>-(pyrrolidinyl)styryl]-<i>N</i>-methylpyridinium iodide, has been synthesized, and the two-photon-absorption (TPA), TPA-induced frequency upconversion emission, and two-photon-pumped (TPP) frequency upconverted lasing properties of this new dye were experimentally studied. This new dye has a moderate TPA cross section of ς<sub>2</sub> = 5.7 × 10<sup>−48</sup> (cm<sup>4</sup> s<sup>−1</sup>)/photon at 1064 nm but exhibits high lasing efficiency. The slope efficiency of the TPP cavity laser with this new dye as the laser medium is 1.6%.
© 2001 Optical Society of America
Chun Wang, Xiaomei Wang, Zongshu Shao, Xian Zhao, Guangyong Zhou, Dong Wang, Qi Fang, and Minhua Jiang, "Optical Properties of a New Two-Photon Absorbing Chromophore," Appl. Opt. 40, 2475-2478 (2001)