title: Fractional laser photothermolysis using Bessel beams.
abstract: Fractional photothermolysis uses lasers to generate a pattern of microscopic columnar thermal lesions within the skin stimulating collagen remodeling. In this paper we investigate the use of Bessel beams as an alternative to conventional Gaussian beams in creating laser photothermal lesions of different aspect ratios in skin. We show for the first time the improved photothermal lesion depth-to-diameter aspect ratio using Bessel beams inex vivohuman skin as well as in numerical simulations using electric field Monte Carlo photon transport, finite difference methods and Arrhenius model. Bessel beams allow the creation of deep and narrow thermal lesions necessary for improved efficacy in fractional photothermolysis.
authors.affiliation: Department of Personal Care and Wellness, Philips Research, 5656 AE, Eindhoven, The Netherlands.
authors.forename: Charles
authors.initials: C
authors.lastname: Mignon
authors.affiliation: Department of Personal Care and Wellness, Philips Research, 5656 AE, Eindhoven, The Netherlands.
authors.forename: Aura Higuera
authors.initials: AH
authors.lastname: Rodriguez
authors.affiliation: Department of Personal Care and Wellness, Philips Research, 5656 AE, Eindhoven, The Netherlands.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Palero
authors.affiliation: Department of Personal Care and Wellness, Philips Research, 5656 AE, Eindhoven, The Netherlands.
authors.forename: Babu
authors.initials: B
authors.lastname: Varghese
authors.affiliation: Department of Personal Care and Wellness, Philips Research, 5656 AE, Eindhoven, The Netherlands.
authors.forename: Martin
authors.initials: M
authors.lastname: Jurna
keywords: (140.3300) Laser beam shaping; (140.6810) Thermal effects; (170.0170) Medical optics and biotechnology