2-PHOTON PUMPED FREQUENCY-UP-CONVERSION LASING OF A NEW BLUE-GREEN DYE MATERIAL

The two-photon absorption and two-photon pumped (TPP) frequency-upconv erted green lasing properties of a new dye, -methyl-4-pyridinio)-2-(N- methylpyrrol-2-yl)ethene triflate (abbreviated as M-PPE) have been exp erimentally investigated. This new dye exhibits a low lasing threshold and high lasing efficiency when pumped with a 800-nm pulsed laser bea m. The spectral, temporal, and spatial structures as well as the outpu t/input characteristics of the TPP cavity lasing were measured using a 1 cm-path quartz cuvette filled with the M-PPE solution in dimethyl s ulfoxide. The net conversion efficiency from the absorbed 800-nm pump pulse energy to the similar to 543-nm upconverted cavity lasing energy was found to be as high as similar to 11%. (C) 1997 Elsevier Science B.V.