Abstract
Using Q-switched Nd:YAG laser excitation, we investigate both theoretically and experimentally the energy transfer between dyes Pyronin-Y (PY) and cresyl violet (CV) incorporated in a methyl methacrylate (MMA) matrix. From the absorption and fluorescence spectral data of PY and CV dyes, we calculate the absorption and emission cross-section of donor and acceptor dye molecules, the critical transfer radius R0, the critical concentration C0, the half-quenching concentration C1/2, and the Foster-type transfer rate k f . We study the influence of donor–acceptor concentration and pump power on the energy transfer and its mechanism. Both energy transfer phenomenon and the self-absorption mechanism play a role in laser tunability. We achieve a tuning of the output wavelength (between 580 and 670 nm) by varying the periodic gain modulation generated by a Q-switched Nd:YAG laser.
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Vijayaraghavan, G.V., Ahamed, M.B. Distributed-Feedback Solid-State Polymeric-Dye Lasers Based on Excitation-Energy Transfer. J Russ Laser Res 35, 531–538 (2014). https://doi.org/10.1007/s10946-014-9458-8
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DOI: https://doi.org/10.1007/s10946-014-9458-8