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Cr4+:YAG as passive Q-switch for a Nd:YALO oscillator with an average repetition rate of 2.7 kHz, TEM00 mode and 13 W output

  • Advanced Optically Pumped Solid-State Lasers
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Abstract

A conventional pulsed Nd:YALO oscillator was passively Q-switched with a Cr4+:YAG crystal. During each of the flashes, with a repetition rate of 100 Hz, a burst of 27 Q-switch pulses with a half width (FWHM) of 140 ns was generated. The minimal pulse-to-pulse time interval within the burst was about 5 µs. The average repetition rate of these Q-switch pulses was 27 × 100 Hz. Nd: YALO as active material does not show any thermally induced birefringence and therefore a good TEM00 mode was realized despite the high thermal load of the crystal. The 4 × 79 mm laser rod produced 13 W average output power at 1080 nm with an efficiency of 0.5%. In contrast to earlier used LiF:F −2 absorbers as passive Q-switch the Cr4+:YAG-crystals did not bleach and therefore the system operated very stable and reliable.

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Authors and Affiliations

  1. Optisches Institut, Technische Universität Berlin, Straβe des 17. Juni 135, D-10623, Berlin, Germany

    H. J. Eichler, A. Haase & R. Menzel

  2. Union Carbide, 98671, Washougol, WA, USA

    M. R. Kokta

Authors
  1. H. J. Eichler
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  2. A. Haase
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  3. M. R. Kokta
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  4. R. Menzel
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Eichler, H.J., Haase, A., Kokta, M.R. et al. Cr4+:YAG as passive Q-switch for a Nd:YALO oscillator with an average repetition rate of 2.7 kHz, TEM00 mode and 13 W output. Appl. Phys. B 58, 409–411 (1994). https://doi.org/10.1007/BF01081882

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  • DOI: https://doi.org/10.1007/BF01081882

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