Non-intrusive temperature measurements using three-color laser-induced fluorescence

Characterization of the evaporation of interacting droplets using combined optical techniques

“…Interpretation for these differences is that intermolecular deactivations of the excited states (mainly by collisional quenching) are temperature-dependent processes that are by nature function of the quencher type and hence the liquid solvent containing the dye molecules. Based on previous works (Lavieille et al 2004), an appropriate fitting of the calibration curves is provided by:…”

Development steps of 2-color laser-induced fluorescence with MDR-enhanced energy transfer for instantaneous planar temperature measurement of micro-droplets and sprays

“…Emission of OBN becomes visible in addition to PM597's fluorescence. Lasing that occurs for OBN now, is not visible in the given diagram, but definitively takes place for wavelengths higher than 660 nm 8 . Validity of 2cLIF theory for the chosen dye concentrations and subsequent energy transfer has been proven in our previous investigations [2]: although EET causes saturation of spontaneous fluorescence emission in the 2cLIF wavelength bands, self-similarity of the normalized emission spectrum remains and thus 2cLIF theory yields.…”

“…different types of fluorophores for various liquids [6,7] or a third PMT for an additional wavelength band that accounts for self-absorption effects of a single dye [8]. More interestingly, latest 2cLIF publications consider a pulsed laser for fluorescence excitation [2,9,10].…”

Temperature and chemical composition of droplets by optical measurement techniques: a state-of-the-art review

“…In this figure, values of b are significantly lower in the yellow-green region of the fluorescence spectrum than in the red edge spectral region. Based on experimental measurements, Lavieille et al (2004) suggested the following expression for the fluorescence intensity I f,i detected over a specific spectral band noted i: …”