Abstract
Trans-4-[p-(N-hydroxyethyl-N-ethylamino)styryl]-N-methylpyridinium p-toluene sulfonate (abbreviated as HEASPS) is a two-photon-absorption (TPA) dye newly synthesized by our research group. It possesses a much larger TPA cross-section and much stronger upconversion fluorescence emission than those of common organic dyes (such as rhodamine) when excited with near-infrared (IR) radiation. TPA spectrum and upconversion efficiency spectrum of HEASPS solution at different wavelengths have been measured. The largest molecular TPA cross-section σ2 ′ is measured to be 2.06×10-47 cm4 s/photon at 930 nm. At 1064 nm, σ2 ′ is 2.71×10-48 cm4 s/photon, which is only one-ninth of that at 930 nm. The upconverted lasing efficiency spectrum has been measured at different wavelengths. The highest efficiency is 5.1% at 1020 nm, whereas it is 3.5% at 1064 nm. Its optical-power-limiting properties at 930 nm have also been illustrated.
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Received: 30 November 2000 / Published online: 27 April 2001
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Zhou, G., Ren, Y., Wang, D. et al. Nonlinear optical properties of a new two-photon-absorption organic dye: HEASPS. Appl Phys B 72, 937–940 (2001). https://doi.org/10.1007/s003400100560
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DOI: https://doi.org/10.1007/s003400100560