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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 8 — Apr. 15, 2007
  • pp: 930–932

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)
http://dx.doi.org/10.1364/OL.32.000930


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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 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

History
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

Citation
Satoshi Narita, Yuji Matsuura, and Mitsunobu Miyagi, "Tapered hollow waveguide for focusing infrared laser beams," Opt. Lett. 32, 930-932 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-8-930


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