15 May 2012 Transfer capability of 3-5 μm radiation by hollow glass waveguide
Author Affiliations +
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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michal Nemec, Helena Jelínková, Mitsunobu Miyagi, Hiroyuki Takaku, Katsumasa Iwai, Yuji Matsuura, Maxim Doroshenko, "Transfer capability of 3-5 μm radiation by hollow glass waveguide", Proc. SPIE 8433, Laser Sources and Applications, 84331H (15 May 2012); doi: 10.1117/12.921525; https://doi.org/10.1117/12.921525


Back to Top