Dual-Wavelength Q-Switched LED-Pumped Lasers: Hybrid Nd:YLF/Glass Dual-Rod Injection Seeding

In this paper, we demonstrated a LED-side-pumped hybrid Nd:YLF and Nd:glass laser achieving dual-wavelength operation at 1047 nm and 1053 nm without any optical tuning elements. In the quasi-continuous wave (QCW) regime, the laser achieved a maximum average power of 2.71 W at a 20 Hz repetition. Under active Q-switching, a peak output power of 2.087 kW was obtained with 184 ns pulse duration at 500 Hz repetition rate, while the beam quality factor (M<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>) measured 9.8. To the best of the authors’ knowledge, this is the first demonstration of a dual-wavelength laser using intracavity seeded light injection technology, providing a novel approach to extend laser emission into adjacent spectral regions and enabling stable terahertz radiation sources.