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Proceedings Paper

Transfer capability of 3-5 um radiation by hollow glass waveguide
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Paper Abstract

The aim of this work was the delivery investigation of 3 - 5 μm laser radiation by a hollow glass waveguide. The waveguide was formed by a supporting fused silica glass capillary tube with a silver layer deposited on the inside wall. As an inner dielectric material film, a cyclic olefin polymer (COP) was used. The primary parameters of the sample investigated were the inner/outer diameter 700/850 μm and the length of up to 110 cm. As radiation sources, three lasers generating in mid-infrared spectral region were designed and constructed. The flash-lamp-pumped Er:YAG laser operated at 2.94 μm wavelength. The second system was 4.3 μm Dy:PbGa2S4 laser. Its coherent pumping was performed by the flashlamp pumped Er:YLF laser generating at 1.73 μm wavelength. The third laser emitting at 4.45 μm was based on Fe:ZnSe active medium pumped by electro-optically Q-switched Er:YAG laser radiation (2.94 μm). The study presented describes a transfer capability of 3 - 5 μm radiation by COP/Ag hollow glass waveguide. The delivery efficiency and spatial structure were investigated. The transmission measured reached 84 %, 58 %, and 64 % for Er:YAG (2.94 μm), Dy:PbGa2S4 (4.3 μm), and Fe:ZnSe (4.45 μm) laser systems, respectively. The spatial beam structure transferred was similar for all systems. The laser delivery system based on COP/Ag hollow glass waveguide can be useful for some mid-infrared radiation applications.

Paper Details

Date Published: 15 May 2012
PDF: 7 pages
Proc. SPIE 8433, Laser Sources and Applications, 84331H (15 May 2012); doi: 10.1117/12.921525
Show Author Affiliations
Michal Nemec, Czech Technical Univ. in Prague (Czech Republic)
Helena Jelínková, Czech Technical Univ. in Prague (Czech Republic)
Mitsunobu Miyagi, School Corp. of Tohoku Gakuin (Japan)
Hiroyuki Takaku, School Corp. of Tohoku Gakuin (Japan)
Katsumasa Iwai, Sendai National College of Technology (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)
Maxim Doroshenko, A. M. Prokhorov General Physics Institute (Russian Federation)

Published in SPIE Proceedings Vol. 8433:
Laser Sources and Applications
Thomas Graf; Jacob I. Mackenzie; Helena Jelínková; John Powell, Editor(s)

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