Sub-Nanosecond Passively Q-Switched Yellow and Orange Raman Lasers
- Resource Type
- article
- Authors
- Yu-Wen Ho; Jian-Cheng Chen; Yueh-Chi Tu; Hsing-Chih Liang; Yung-Fu Chen
- Source
- Photonics, Vol 11, Iss 2, p 157 (2024)
- Subject
- stimulated Raman scattering
passively Q-switched laser
Nd:YVO4 crystal
KGW crystal
Applied optics. Photonics
TA1501-1820
- Language
- English
- ISSN
- 2304-6732
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.