Studies of two-photon pumped frequency-upconverted lasing properties of a new dye material
- Photonics Research Laboratory, Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000 (United States)
The two-photon absorption (TPA), TPA-induced frequency upconversion emission, and two-photon-pumped (TPP) lasing properties of a new dye, {ital trans}-4[{ital p}-(N-hydroxyethylN-methylamino)stryryl]-N-methylpyridinium iodide (abbreviated as ASPI) were experimentally investigated. This new dye has a moderate TPA cross section ({sigma}{sub 2}{approx}3.9{times}20{sup {minus}20} cm{sup 4}/GW in benzyl alcohol), but exhibits a low lasing threshold and high lasing efficiency when pumped with a 1064 nm pulsed laser beam. Furthermore, the TPA-induced fluorescence yield is strongly dependent on the polarity of the solvent, making it a promising dye for sensing applications. The spectral, temporal, and spatial structures as well as the output/input characteristics of the TPP cavity lasing and the superradiant (cavityless) lasing are systematically measured using a 1 cm path quartz cuvette filled with the ASPI solution or a doped polymer rod. The net conversion efficiency from the absorbed 1064 nm pump pulse energy to the {approximately}615 nm upconverted cavity lasing energy was found to be as high as {approximately}17{percent}. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 467218
- Journal Information:
- Journal of Applied Physics, Vol. 81, Issue 6; Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
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