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Peer-reviewedCC BY 4.0Applied optics

Efficient 640 nm actively Q-switched Pr:YLF laser

  • Remi Garot-Jacquey
  • Lauren Guillemot
  • Remi Soulard
  • Gabriel Mennerat
  • Pavel Loiko
  • Patrice Camy
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Abstract

An electro-optical (EO) Q-switched laser at 640 nm in Pr 3+ :LiYF 4 (Pr:YLF) is achieved in a compact plane-parallel cavity design. An intracavity lens enables a tightly focused mode within the praseodymium-doped crystal while maintaining a collimated beam in the EO modulator. This configuration is expected to reduce astigmatism and depolarization losses. Under Q-switching laser operation, the system delivers a single-pulse energy of 28.9 µJ with a pulse duration of 47.5 ns at a repetition rate of 5 kHz. When operated at 20 kHz, the laser produces an average power of 380 mW, corresponding to a slope efficiency of 21.2%, demonstrating efficient energy extraction from the Pr:YLF gain medium under EO modulation. To the best of our knowledge, this result represents the highest slope efficiency reported for an EO Q-switched visible Pr:YLF laser.

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Cite

BibTeXRIS
BibTeX
@article{garotjacquey2026efficient,
  title = {{Efficient 640 nm actively Q-switched Pr:YLF laser}},
  author = {Remi Garot-Jacquey and Lauren Guillemot and Remi Soulard and Gabriel Mennerat and Pavel Loiko and Patrice Camy},
  journal = {Applied optics},
  year = {2026},
  month = aug,
  doi = {10.1364/ao.606251},
  url = {https://hal.science/hal-05726204v1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Efficient 640 nm actively Q-switched Pr:YLF laser
AU  - Remi Garot-Jacquey
AU  - Lauren Guillemot
AU  - Remi Soulard
AU  - Gabriel Mennerat
AU  - Pavel Loiko
AU  - Patrice Camy
PY  - 2026
DA  - 2026/08/03
JO  - Applied optics
DO  - 10.1364/ao.606251
UR  - https://hal.science/hal-05726204v1
AB  - An electro-optical (EO) Q-switched laser at 640 nm in Pr 3+ :LiYF 4 (Pr:YLF) is achieved in a compact plane-parallel cavity design. An intracavity lens enables a tightly focused mode within the praseodymium-doped crystal while maintaining a collimated beam in the EO modulator. This configuration is expected to reduce astigmatism and depolarization losses. Under Q-switching laser operation, the system delivers a single-pulse energy of 28.9 µJ with a pulse duration of 47.5 ns at a repetition rate of 5 kHz. When operated at 20 kHz, the laser produces an average power of 380 mW, corresponding to a slope efficiency of 21.2%, demonstrating efficient energy extraction from the Pr:YLF gain medium under EO modulation. To the best of our knowledge, this result represents the highest slope efficiency reported for an EO Q-switched visible Pr:YLF laser.
SN  - 1559-128X
SN  - 2155-3165
ER  -