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Effective stimulated emission cross-sections determined by transient fluorescence amplification in a Fabry–Pe´rot resonator

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Abstract

The amplification of fluorescence light of an active medium in a Fabry-Pe´rot resonator, transversely pumped with picosecond pulses, is exploited to determine the effective stimulated emission cross-section spectrum, σem,eff(λ). A theory is presented for the ratio of amplified fluorescence output to spontaneous emission signal (resonator mirrors removed). The detection sensitivity is enhanced by the multi-pass amplification. Its dependence on the output mirror reflectivity and residual ground-state absorption in the emission region is analysed. As an example the effective stimulated emission cross-section spectrum of coumarin 2 in methanol is measured in the wavelength region 435nm to 610nm.

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Authors and Affiliations

  1. Institut II - Experimentelle und Angewandte Physik, Universita¨t Regensburg, D-93040, Regensburg, Germany

    A. Penzkofer, W. Holzer & S.-H. Gong

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  1. A. Penzkofer
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  2. W. Holzer
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  3. S.-H. Gong
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Penzkofer, A., Holzer, W. & Gong, SH. Effective stimulated emission cross-sections determined by transient fluorescence amplification in a Fabry–Pe´rot resonator. Optical and Quantum Electronics 29, 611–626 (1997). https://doi.org/10.1023/A:1018532323057

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  • DOI: https://doi.org/10.1023/A:1018532323057

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