Tapered hollow waveguide for focusing infrared laser beams

Satoshi Narita; Yuji Matsuura; Mitsunobu Miyagi

doi:10.1364/OL.32.000930

Tapered hollow waveguide for focusing infrared laser beams

Satoshi Narita, Yuji Matsuura, Mitsunobu Miyagi

MEN - Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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 μm, respectively, the insertion loss is as small as 0.7 dB in a 10 mm long taper. The hollow taper optic producing a 200 μm 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.

Original language	English
Pages (from-to)	930-932
Number of pages	3
Journal	Optics Letters
Volume	32
Issue number	8
DOIs	https://doi.org/10.1364/OL.32.000930
Publication status	Published - 2007 Apr 15

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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AB - 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 μm, respectively, the insertion loss is as small as 0.7 dB in a 10 mm long taper. The hollow taper optic producing a 200 μm 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.

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Tapered hollow waveguide for focusing infrared laser beams

Abstract

ASJC Scopus subject areas

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