Electro-optically Q-switched Er:YAG laser and its application

Petr Koranda, Michal Němec, Helena Jelínkova, Jan Šulc, Miroslav Čech, Yi Wei Shi, Yuji Matsuura, Mitsunobu Miyagi

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

For many applications (in medicine and industry) powerful mid-infrared radiation can be useful. For this reason, Q-switch operated Er:YAG laser and corresponding delivery system are necessary. We report about specially designed LiNbO3 Pockels cell by help of which the short 60 ns mid-infrared pulses were generated. For giant pulse generation two Brewster angle cut LiNbO3 crystal was inserted inside the oscillator and a specially designed driver ensured the precise time of Pockels cell switching. The optimization of the input parameters (high voltage value and Pockels cell switching time), which can have an impact on the output pulse characteristics, was performed. For the optimal found delay value 450 μs and the applied high voltage 1.4 kV on the Pockels cell, giant pulses with length of 60 ns and energy of 60 mJ were generated. It gave 1MW of the output peak power. These powerful infrared pulses (A = 2.94 μm) were delivered by the help of specially designed cyclic olefin polymer-coated silver hollow glass waveguide with the inner diameter 700 μm and length of 1 m. For the contact treatment sealed cap was used. The measured transmission of the whole delivery system was 76.5 % which gave the output interaction intensity 79MW/cm2.

Original languageEnglish
Article number69
Pages (from-to)384-389
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5777
Issue numberPART I
DOIs
Publication statusPublished - 2005 Oct 18
EventXV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, GCL/HPL 2004 - Prague, Czech Republic
Duration: 2004 Aug 302004 Sep 3

Keywords

  • Er:YAG laser
  • Hollow waveguide
  • LiNbO Pockels cell
  • Q-switching

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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