Labus M, Huber F, Will S (2025)
Publication Type: Journal article
Publication year: 2025
Book Volume: 131
Article Number: 176
Journal Issue: 9
DOI: 10.1007/s00340-025-08534-8
The present work demonstrates shot-to-shot calibrated imaging thermometry in a spray-flame-synthesis (SFS) process by utilizing two-line atomic fluorescence (TLAF) of indium atoms. Measurements in this highly turbulent, particle-laden flame were accomplished by implementing two optical parametric oscillators (OPOs) designed for pulsed operation in order to generate radiation with the required excitation wavelengths. The OPOs were optimized towards a narrow-band spectral output while maintaining high tunability. A linear OPO design was realized, which is capable to produce laser radiation with a bandwidth as narrow as 148 pm. These laser sources were employed to excite the transition at 410.13 nm and the transition at 451.13 nm using to two coplanar light sheets formed, one from each OPO. As this TLAF-method requires calibration, the light sheets were split by a 50:50 beam splitter and guided through two burners simultaneously, one being a calibration flame with a known temperature profile and the other one being the flame of a spray-flame-synthesis burner. By recording the fluorescence signals from both flames in the same camera frame, calibration could be conducted for each single shot, which allows to compensate for shot-to-shot spatial irradiance fluctuations of the OPOs. The shown TLAF-measurement set-up thus enables highly reliable and accurate single-shot measurements of flame temperatures in SFS.
APA:
Labus, M., Huber, F., & Will, S. (2025). Imaging thermometry in a spray flame synthesis process via single shot two-line atomic fluorescence using pulsed narrow-band optical parametric oscillators. Applied Physics B-Lasers and Optics, 131(9). https://doi.org/10.1007/s00340-025-08534-8
MLA:
Labus, Markus, Franz Huber, and Stefan Will. "Imaging thermometry in a spray flame synthesis process via single shot two-line atomic fluorescence using pulsed narrow-band optical parametric oscillators." Applied Physics B-Lasers and Optics 131.9 (2025).
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