title: Model for indirect laser surgery.
abstract: We present a theoretical model for laser cutting of biological tissue by a strongly heated fiber tip with a highly absorbing coating. A significant dependence of the cutting speed and cutting depth on the inclination angle of the scalpel to the surface when scattering exceeds absorption in the biological tissue is shown. Experimental evidences of this effect are presented. In the experiment, we used silica fiber with coating made of carbon and silicon organic varnish, the 0.97-µm wavelength laser and porcine skin. The additional opportunity to increase the efficiency of cutting by deposition of the absorbing layer on the tissue surface is considered.
authors.affiliation: Institute of Applied Physics of the Russian Academy of Science, Federal State Budgetary Institution of Science, 46 Ulyanova Street, Nizhny Novgorod, 603950, Russia.
authors.forename: Natalia
authors.initials: N
authors.lastname: Sapogova
authors.affiliation: Institute of Applied Physics of the Russian Academy of Science, Federal State Budgetary Institution of Science, 46 Ulyanova Street, Nizhny Novgorod, 603950, Russia.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Bredikhin
authors.affiliation: Institute of Applied Physics of the Russian Academy of Science, Federal State Budgetary Institution of Science, 46 Ulyanova Street, Nizhny Novgorod, 603950, Russia.
authors.forename: Nikita
authors.initials: N
authors.lastname: Bityurin
authors.affiliation: Institute of Applied Physics of the Russian Academy of Science, Federal State Budgetary Institution of Science, 46 Ulyanova Street, Nizhny Novgorod, 603950, Russia.
authors.forename: Vladislav
authors.initials: V
authors.lastname: Kamensky
authors.affiliation: Institute of Photon Technologies of Federal Scientific Research Center, "Crystallography and Photonics" RAS, Troitsk, Moscow 142190, Russia.
authors.forename: Vjacheslav
authors.initials: V
authors.lastname: Zhigarcov
authors.affiliation: Institute of Photon Technologies of Federal Scientific Research Center, "Crystallography and Photonics" RAS, Troitsk, Moscow 142190, Russia.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Yusupov
keywords: (140.6810) Thermal effects; (170.0170) Medical optics and biotechnology; (170.1020) Ablation of tissue