Temperature dependence of water absorption for wavelengths at 1920 nm and 1940 nm

Dirk Theisen-Kunde*, Veit Danicke, Mario Wendt, Ralf Brinkmann

*Korrespondierende/r Autor/-in für diese Arbeit

Abstract

In this study the absorption coefficient of water at different temperatures was investigated for wavelengths at 1920 nm and 1940 nm respectively. The laser radiation was transmitted via a quartz fibre (600 μm core) into a thermal isolated and heated water filled cuvette. At different temperatures the transmittance of water was measured for both wavelengths. According to Beer-Lambert's law the absorption coefficient α was calculated. Absorption coefficient α of water for 1940 nm decreases from 129.2±1.7 /cm2 @ 20 °C to 118.7±1.9 /cm2 @ 80 °C, while for 1920 nm α increases from 126.4±1.6 /cm2 @ 20 °C to 142.5±1.6 /cm2 @ 80 °C. For 35 °C the water absorption coefficient is 127.3±1.6 /cm2 for 1940 nm and 132.5±1.9 /cm2 for 1920 nm. For both wavelengths in vivo investigations for ablation efficiency are planned to answer the question, if these differences are significant for laser surgery.

OriginalspracheEnglisch
Titel4th European Conference of the International Federation for Medical and Biological Engineering
Redakteure/-innenJos Vander Sloten, Pascal Verdonck, Marc Nyssen, Jens Haueisen
Seitenumfang2
Band22
ErscheinungsortBerlin, Heidelberg
Herausgeber (Verlag)Springer-Verlag Berlin Heidelberg
Erscheinungsdatum2008
Seiten2228-2229
ISBN (Print)978-3-540-89207-6
ISBN (elektronisch)978-3-540-89208-3
DOIs
PublikationsstatusVeröffentlicht - 2008
Veranstaltung4th European Conference of the International Federation for Medical and Biological Engineering - Antwerp, Belgien
Dauer: 23.11.200827.11.2008
Konferenznummer: 81647

Strategische Forschungsbereiche und Zentren

  • Forschungsschwerpunkt: Biomedizintechnik

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