4.6 Article

Highly stable sub-nanosecond Nd:YAG pump laser for optically synchronized optical parametric chirped-pulse amplification

Journal

OPTICS EXPRESS
Volume 29, Issue 20, Pages 32404-32411

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.430953

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Funding

  1. Council for Science, Technology and Innovation (ImPACT Program)
  2. Japan Society for the Promotion of Science (JSPS) KAKENHI [JP16K17541]

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The study developed an optically synchronized highly stable Nd:YAG laser with sub-nanosecond pulse duration and high efficiency. By utilizing multiple techniques, successful green pulse energy conversion was achieved, along with obtaining longer pulse durations.
We developed an optically synchronized highly stable frequency-doubled Nd:YAG laser with sub-nanosecond pulse duration. The 1064 nm seed pulses generated by soliton self-frequency shift in a photonic crystal fiber from Ti:sapphire oscillator pulses were stabilized by controlling input pulse polarization. The seed pulses were amplified to 200 mJ by diode-pumped amplifiers with a high stability of only <0.2% (rms). With an external LBO doubler, the system generated 330 ps green pulse energy of 130 mJ at 532 nm with a conversion efficiency of 65%. The pulse duration was further extended to 490 ps by adjusting Nd:YAG crystal temperature. To the best of our knowledge, these results present a longer pulse duration with higher stability than previous Nd:YAG lasers with sub-nanosecond optical synchronization. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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