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

Petr Koranda; Michal Nemec; Helena Jelinkova; Jan Sulc D.D.S.; Miroslav Cech M.D.; Yi-Wei Shi; Yuji Matsuura; Mitsunobu Miyagi

doi:10.1117/12.611042

23 March 2005 Electro-optically Q-switched Er:YAG laser and its application

Petr Koranda, Michal Nemec, Helena Jelinkova, Jan Sulc D.D.S., Miroslav Cech M.D., Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi

Author Affiliations +

Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.611042
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

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 systems 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 1.4kV on the Pockels cell, giant pulses with length of 60 ns and energy of 60mJ were generated. It gave 1 MW of the output peak power. These powerful infrared pulses (λ= 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 79 MW/cm².

Citation Download Citation

Petr Koranda, Michal Nemec, Helena Jelinkova, Jan Sulc D.D.S., Miroslav Cech M.D., Yi-Wei Shi, Yuji Matsuura, and Mitsunobu Miyagi "Electro-optically Q-switched Er:YAG laser and its application", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.611042

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