Original figure legend: <i>Perrin-Jablonski fluorescence diagram. Simplified Perrin-Jablonski scheme for 1PE, 2PE and 3PE. Once the excited state has been reached the subsequent fluorescent emission is the very same for the three different modalities of excitation.</i>
Alberto Diaspro, Paolo Bianchini, Giuseppe Vicidomini, Mario Faretta, Paola Ramoino and Cesare Usai
CC BY 2.0
<p><i>Multi-photon excitation microscopy.</i> BioMedical Engineering OnLine, 2006, 5:36. <br>
DOI:10.1186/1475-925X-5-36. <br></p>
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