Delivery of powerful radiation in visible spectral region by special waveguides

H. Jelínková, M. Miyagi, J. Šulc, P. Černý, Y. W. Shi, Y. Matsuura, G. Takada

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


For delivery of powerful radiation in visible spectral region - cyclic olefin polymer-coated silver (COP/Ag) hollow glass waveguides with a length of 1 m and inner diameters of 1 mm were tested. As radiation sources - alexandrite electro-optically Q-switched laser generating tunable radiation centered at 750 nm (fundamental) or 375 nm (SHG) and two Q-switched and mode-locked Nd:YAG lasers generating wavelengths 1064 nm (fundamental) or 532 nm (SHG) were used. In every case, the output beam was coupled into the COP/Ag hollow glass waveguide. Coupling of radiation was optimized investigating several waveguide input protectors made from different materials to avoid spark generation at high radiation intensity. Transmittance/attenuation as a function of the input laser energy was measured in dependence to input radiation wavelength. The input/output time radiation characteristics and the spatial distributions of the output beams were also investigated. Transmission efficiency of the COP/Ag waveguides was found to be 80-95 % in the spectral range from green to near infrared. In the blue region, transmittance was 66 %. The measured transmission properties make COP/Ag hollow glass waveguides very promising for delivery of high-power laser pulses in medicine and also in other applications.

Original languageEnglish
Pages (from-to)58-67
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2001
EventOptical Fibers and Sensors for Medical Applications - San Jose, CA, United States
Duration: 2001 Jan 202001 Jan 21


  • Cyclic olefin polymer-coated silver hollow glass waveguide
  • Nd:YAG laser
  • Picosecond pulses


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