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Proceedings Paper

Dy:PbGa2S4 laser radiation and its delivery by hollow waveguide
Author(s): Helena Jelínková; Michal Nemec; Mitsunobu Miyagi; Katsumasa Iwai; Hiroyuki Takaku; Maxim Doroshenko; Tasoltan T. Basiev; Valerii V. Badikov; Dmitri V. Badikov
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Paper Abstract

The mid-infrared radiation generated by bulk Dy:PbGa2S4 laser working at room temperature was characterized and for its delivery the special type of COP/Ag hollow waveguide was used. The optical pumping of Dy:PbGa2S4 laser was performed by flashlamp pumped Er:YLF laser at 1.73 μm wavelength. The compact 60 mm long Dy:PbGa2S4 laser oscillator worked in free-running mode with the repetition rate 1.5 Hz. The output energy was 5.1 mJ in 80 μs long pulse at 4.3 μm wavelength. The spatial beam structure was close to the Gaussian shape. The goal of the presented study was the preliminary investigation of the mid-infrared Dy:PbGa2S4 radiation delivery possibility by the cyclic olefin polymer and silver coated hollow glass waveguide. The length of the waveguide was 103 cm and the inner diameter was 700 μm. The thickness of the polymer inner layer was calculated for the optimal 4 μm radiation transmission. Mid-infrared laser radiation was coupled into the waveguide by the CaF2 lens with the focal length 55 mm. The characterization of delivered 4.3 μm radiation was provided. It was observed that the spatial structure is changing essentially, which follows from the transmission principle of the hollow waveguide. As conclude the delivery system for 4.3 μm mid-infrared Dy:PbGa2S4 laser radiation was investigated for the first time.

Paper Details

Date Published: 30 January 2012
PDF: 5 pages
Proc. SPIE 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII, 82180R (30 January 2012); doi: 10.1117/12.908113
Show Author Affiliations
Helena Jelínková, Czech Technical Univ. in Prague (Czech Republic)
Michal Nemec, Czech Technical Univ. in Prague (Czech Republic)
Mitsunobu Miyagi, Sendai National College of Technology (Japan)
Katsumasa Iwai, Sendai National College of Technology (Japan)
Hiroyuki Takaku, Sendai National College of Technology (Japan)
Maxim Doroshenko, A. M. Prokhorov General Physics Institute (Russian Federation)
Tasoltan T. Basiev, A. M. Prokhorov General Physics Institute (Russian Federation)
Valerii V. Badikov, Kuban State Technological Univ. (Russian Federation)
Dmitri V. Badikov, Kuban State Technological Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 8218:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII
Israel Gannot, Editor(s)

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