Sequences of picosecond pulses of 1.06-μm Nd:YAG laser radiation with a total energy of ~2 mJ are transmitted through a hollow-core photonic-crystal fiber with a core diameter of ~14 μm and are focused onto a tooth’s surface <i>in vitro</i> to ablate dental tissue. The hollow-core photonic-crystal fiber is shown to support the single-fundamental-mode regime for 1.06-μm laser radiation, serving as a spatial filter and allowing the laser beam’s quality to be substantially improved. The same fiber is used to transmit emission from plasmas produced by laser pulses onto the tooth’s surface in the backward direction for detection and optical diagnostics.
© 2004 Optical Society of America
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(170.1850) Medical optics and biotechnology : Dentistry
Stanislav O. Konorov, Vladimir P. Mitrokhin, Andrei B. Fedotov, Dmitrii A. Sidorov-Biryukov, Valentin I. Beloglazov, Nina B. Skibina, Andrei V. Shcherbakov, Ernst Wintner, Michael Scalora, and Aleksei M. Zheltikov, "Laser Ablation of Dental Tissues with Picosecond Pulses of 1.06-µm Radiation Transmitted through a Hollow-Core Photonic-Crystal Fiber," Appl. Opt. 43, 2251-2256 (2004)