Investigations on transfer of the novel diode pumped Er:YAG laser radiation by special hollow glass waveguide

Michal Němec; Helena Jelínková; Jan Šulc; Katsumasa Iwai; Hiroyuki Takaku; Mitsunobu Miyagi

doi:10.1117/12.2607566

4 March 2022 Investigations on transfer of the novel diode pumped Er:YAG laser radiation by special hollow glass waveguide

Michal Němec, Helena Jelínková, Jan Šulc, Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi

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Proceedings Volume 11980, Solid State Lasers XXXI: Technology and Devices; 119800C (2022) https://doi.org/10.1117/12.2607566
Event: SPIE LASE, 2022, San Francisco, California, United States

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Abstract

Delivery of flashlamp pumped Er:YAG laser radiation (λ = 2.94 μm) by a hollow waveguide is quite well known. The goal of this study was to investigate the potential of connection of a novel diode pumped Er:YAG laser with a hollow glass waveguide and to design a new possibility for mid-IR radiation transfer. The expected use would be in medicine and therefore a sufficiently flexible and lossless delivery system is required. The base of transfer system was a special cyclic olefin polymer-coated silver (COP/Ag) hollow glass waveguide. The length of the waveguide was 2.15 m and inner diameter 700 μm. Transmission as a function of the input laser power and spatial distributions of the output beams were investigated depending on bending angle of waveguide. The transmission in the straight configuration were 89 % and decreased to 79 % when the fiber was bent to an angle of 180° with a bending radius of 15 cm. The output beam spatial structure was not changed for investigated bending angles 0°, 45°, 90°, and 180° (bending radius of 15 cm). These transmission values predetermine the use of the special hollow glass waveguides in conjunction with the novel diode pumped Er:YAG laser for further research with subsequent use in medicine.

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Michal Němec, Helena Jelínková, Jan Šulc, Katsumasa Iwai, Hiroyuki Takaku, and Mitsunobu Miyagi "Investigations on transfer of the novel diode pumped Er:YAG laser radiation by special hollow glass waveguide", Proc. SPIE 11980, Solid State Lasers XXXI: Technology and Devices, 119800C (4 March 2022); https://doi.org/10.1117/12.2607566

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