Abstract

Pulsed blue light at $489\mathrm{nm}$ has been generated by second-harmonic-generation of a nanosecond pulsed master- oscillator power amplifier system based on a short ${\mathrm{Yb}}^{3+}$ doped single-mode fiber amplifier at $978\mathrm{nm}$ and an external-cavity diode laser as seed source. The ${\mathrm{Yb}}^{3+}$-doped fiber was core-pumped by a W type ${\mathrm{Nd}}^{3+}$ doped double- clad fiber laser operating on the transition near $930\mathrm{nm}$ (${}^4{\mathrm{F}}_{3/2}\to {}^4{\mathrm{I}}_{9/2}$). $520\mathrm{mW}$ of average power was generated at $489\mathrm{nm}$ using a periodically poled $\mathrm{MgO}\text{:}{\mathrm{LiNbO}}_3$, corresponding to a conversion efficiency of 34%.

© 2011 Optical Society of America

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