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 , respectively, the insertion loss is as small as in a long taper. The hollow taper optic producing a spot withstands input energy of . 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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