Abstract
Quasi-continuous-wave (QCW) 589-nm radiation was realized based on a frequency-doubled crystalline Raman laser. The fundamental wave with macro–micro-pulse trains was generated from an acousto-optically Q-switched QCW diode side-pumped Nd:GGG laser. Intracavity Raman conversion was accomplished by a BaWO4 crystal and the second harmonic generation was finished by a KTP crystal. Under a pumping power of 126.0W with a macro-pulse frequency of 300Hz and duration of 300µs, the maximum 589nm output power of 4.2W was obtained at a micro-pulse frequency of 33.3kHz. The micro-pulse width was 13.6ns.
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