Observation of Self-Frequency Doubling in Diode-Pumped Mode-Locked Nd-Doped La₃Ga₅SiO₁₄ Laser

A diode-pumped passively mode-locked Nd-doped La₃Ga₅SiO₁₄ (Nd:LGS) laser is realized by using a semiconductor saturable absorber mirror. With the pump power of 2 W, we obtain a 532 nm self-frequency doubling (SFD) laser together with a 10.9 ps fundamental laser at the repetition rate of 173.7 MHz. To the best of our knowledge, it is the first time for self-frequency doubling in the diode-pumped mode-locked Nd:LGS laser. Benefited from the diode lasers and its self-frequency doubling property, Nd:LGS could be a potential candidate for compact, stable and cheap ultrafast green laser sources.