26 March 2015 Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier
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We are developing joule level picosecond pulse duration laser system operating at repetition rate of 120 Hz. The laser system consists of a seed mode-locked fiber laser and two cryogenically cooled amplifier stages: a single slab regenerative amplifier and a single slab multi-pass amplifier. We have found the displacement of the probe beam caused by mechanical vibrations of the cryostat is less than 0.7 mrad. We have also improved our in-situ gain measurement system by decreasing the spectral line of the narrow band source down to 50 pm. We have found that the emission bandwidth of Yb:YGAG at 160 K is around 7 nm.
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P. Sikocinski, T. Miura, Venkatesan Jambunathan, Jens Linnemann, A. Endo, H. Jelinkova, T. Mocek, "Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93421Z (26 March 2015); doi: 10.1117/12.2079447; https://doi.org/10.1117/12.2079447

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