Sub-Nanosecond Passively Q-Switched Yellow and Orange Raman Lasers

Yu Wen Ho, Jian Cheng Chen, Yueh Chi Tu, Hsing Chih Liang, Yung Fu Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Sub-nanosecond high-peak-power passively Q-switched yellow and orange lasers are compactly developed using a near-concentric resonator with intracavity-stimulated Raman scattering (SRS) as well as second harmonic generation (SHG). The fundamental wave is generated from an a-cut Nd:YVO4 crystal. The Stokes wave for an SHG yellow (579 nm) or orange (589 nm) laser is generated from a Np-cut potassium gadolinium tungstate (KGW) with the Ng or Nm axis parallel to the c-axis of Nd:YVO4 crystal. The optimal cavity length is systematically explored in a near-concentric configuration to achieve sub-nanosecond high-peak-power pulses. The shortest pulse widths for the yellow and orange output pulses are down to 0.67 ns and 0.70 ns, respectively. The highest peak powers for the yellow and orange output pulses are up to 176 and 138 kW, respectively.

Original languageEnglish
Article number157
JournalPhotonics
Volume11
Issue number2
DOIs
StatePublished - Feb 2024

Keywords

  • KGW crystal
  • Nd:YVO crystal
  • passively Q-switched laser
  • stimulated Raman scattering

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