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Proceedings Paper

Hollow-core lensed-taper launching coupler for Er:YAG laser light
Author(s): Yuji Matsuura; Masaru Yaegashi; Mitsunobu Miyagi
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Paper Abstract

We developed a launching coupler for infrared hollow fibers transmitting Er:YAG laser light. The coupler consists of a short piece of tapered-hollow waveguide and a single lens at the entrance. We fabricate the tapered waveguide by stretching a Pyrex glass tube in a cylindrical furnace. By controlling the temperature and the stretching time, the shape of the paper is precisely controlled. Next a silver layer and a polymer layer are formed upon the inside of the tapered waveguide by using a liquid-phase coating method. Experiments performed using Er:YAG laser light showed the low-loss property and the high-power resistivity of the tapered waveguide. Also it was shown that the lensed-taper coupler effectively removed the influence of misalignment between the input laser beam and the hollow fiber.

Paper Details

Date Published: 10 December 1999
PDF: 5 pages
Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999); doi: 10.1117/12.372797
Show Author Affiliations
Yuji Matsuura, Tohoku Univ. (Japan)
Masaru Yaegashi, Tohoku Univ. (Japan)
Mitsunobu Miyagi, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 3849:
Infrared Optical Fibers and Their Applications
Mohammed Saad; James A. Harrington, Editor(s)

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