Abstract

We report external cavity second-harmonic generation of light at 544 and $272\mathrm{nm}$ based on an ytterbium-doped distributed-feedback fiber laser. The nonlinear crystal used to generate light at $544\mathrm{nm}$ is $\mathrm{Li}\mathrm{Nb}{\mathrm{O}}_3$, and the maximum output of the cavity is $845\mathrm{mW}$, corresponding to a conversion efficiency of 55%. In a second frequency-doubling step, using a $\beta \text{-}\mathrm{Ba}{\mathrm{Ba}}_2{\mathrm{O}}_4$ crystal, we generate up to $115\mathrm{mW}$ of light at $272\mathrm{nm}$ with a conversion efficiency of 14%.

© 2007 Optical Society of America

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