Heat transfer in water under laser heating through fibres for endovenous laser coagulation

We report the results of studying heat transfer in water heated by a cw laser with wavelengths of 1.55 and 1.94 μm through optical fibres with end-face and radial outputs. It is shown that, depending on the power and wavelength of the radiation, heat transfer is implemented via convection, bubble bo...

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Veröffentlicht in:	Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-08, Vol.50 (8), p.793-800
Hauptverfasser:	Minaev, V.P., Minaev, N.V., Bogachev, V.Yu, Kaperiz, K.A., Fedorov, D.A., Yusupov, V.I.
Format:	Artikel
Sprache:	eng
Schlagworte:	ATOMIC AND MOLECULAR PHYSICS Boiling CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Coagulation CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY convection endovenous laser coagulation Engineering Engineering, Electrical & Electronic explosive boiling Heat transfer Laser beam heating laser heating of water LASERS OPTICAL FIBERS Physical Sciences Physics Physics, Applied Quantum Science & Technology Science & Technology Technology WATER WAVELENGTHS
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Zusammenfassung:	We report the results of studying heat transfer in water heated by a cw laser with wavelengths of 1.55 and 1.94 μm through optical fibres with end-face and radial outputs. It is shown that, depending on the power and wavelength of the radiation, heat transfer is implemented via convection, bubble boiling, or explosive boiling and occurs asymmetrically, mainly in the forward − upward direction for the fibre with the end-face output and upward for the radial output.
ISSN:	1063-7818 1468-4799
DOI:	10.1070/QEL17226