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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 5 — May. 17, 2007

Tapered hollow waveguide for focusing infrared laser beams

Satoshi Narita, Yuji Matsuura, and Mitsunobu Miyagi  »View Author Affiliations

Optics Letters, Vol. 32, Issue 8, pp. 930-932 (2007)

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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 200 μ m , respectively, the insertion loss is as small as 0.7 dB in a 10 mm long taper. The hollow taper optic producing a 200 μ m spot withstands input energy of 100 mJ . 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

OCIS Codes
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(170.3890) Medical optics and biotechnology : Medical optics instrumentation

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: December 5, 2006
Manuscript Accepted: January 10, 2007
Published: March 19, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

Satoshi Narita, Yuji Matsuura, and Mitsunobu Miyagi, "Tapered hollow waveguide for focusing infrared laser beams," Opt. Lett. 32, 930-932 (2007)

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