Abstract

A tapered hollow waveguide that can focus a laser beam into a small beam spot is proposed for medical and dental applications. We fabricated hollow tapered optics by using a traveling torch, and the shape was formed as a precise linear taper. For a hollow taper tip with input and output diameters of 700 and 200μm, respectively, the insertion loss is as small as 0.7dB in a 10mm long taper. The hollow taper optic producing a 200μm spot withstands input energy of 100mJ. Because a focusing lens is unnecessary at the output end, the laser beam can be introduced into a deep and narrow spot with these tapered optics.

© 2007 Optical Society of America

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