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17 March 2023 Optoacoustic temperature measurement with a single microsecond laser pulse
Eric Seifert, Hossameldin S. Abbas, Ralf Brinkmann
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Proceedings Volume PC12360, Ophthalmic Technologies XXXIII; PC123600T (2023) https://doi.org/10.1117/12.2649833
Event: SPIE BiOS, 2023, San Francisco, California, United States
Abstract
Temperature measurement is demanded for retinal laser treatment with pulse durations of 5µs and longer to take pigmentation variations of the retinal pigment epithelium and choroid into account. An optoacoustic technique to determine the maximum temperature at the end of an irradiation with a single microsecond laser pulse was investigated. A 15W diode laser with 514nm and variable pulse duration was used to irradiate porcine RPE. Gradients of the laser pulse flanks >10W/µs excite pressure transients. Optoacoustic temperature measurements were possible. Cell damage was found at maximum temperatures around 80°C at pulse durations of 35µs and to 50µs.
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Eric Seifert, Hossameldin S. Abbas, and Ralf Brinkmann "Optoacoustic temperature measurement with a single microsecond laser pulse", Proc. SPIE PC12360, Ophthalmic Technologies XXXIII, PC123600T (17 March 2023); https://doi.org/10.1117/12.2649833
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KEYWORDS
Pulsed laser operation
Optoacoustics
Temperature metrology
Biophotonic applications
Calibration
High power lasers
Laser systems engineering
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