Transfer capability of 3-5 μm radiation by hollow glass waveguide

Michal Němec, Helena Jelínková, Mitsunobu Miyagi, Hiroyuki Takaku, Katsumasa Iwai, Yuji Matsuura, Maxim Doroshenko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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:PbGa 2Si 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.

Original languageEnglish
Title of host publicationLaser Sources and Applications
DOIs
Publication statusPublished - 2012
EventLaser Sources and Applications - Brussels, Belgium
Duration: 2012 Apr 162012 Apr 19

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8433
ISSN (Print)0277-786X

Other

OtherLaser Sources and Applications
CountryBelgium
CityBrussels
Period12/4/1612/4/19

Keywords

  • Dy:PbGa S laser
  • Er:YAG laser
  • Fe:ZnSe laser
  • Hollow glass waveguide
  • Mid-IR lasers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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