Abstract

We demonstrated a 670  mW continuous-wave single-frequency laser source at 780   nm by using external-cavity-enhanced second-harmonic generation of a seeded fiber amplifier in periodically poled lithium niobate. A maximum second-harmonic conversion efficiency of 58% was achieved. The source can work stably over 1 h by locking the frequency-doubling cavity, while the power stability is less than 2%.

© 2007 Optical Society of America

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