5.7  W cw single-frequency laser at 671  nm by single-pass second harmonic generation of a 17.2  W injection-locked 1342  nm Nd : YVO4 ring laser using periodically poled MgO : LiNbO3

Applied Optics
Peter KochJohannes A L'huillier

Abstract

We demonstrate a continuous wave single-frequency laser at 671.1 nm based on a high-power 888 nm pumped Nd:YVO4 ring laser at 1342.2 nm. Unidirectional operation of the fundamental ring laser is achieved with the injection-locking technique. A Nd:YVO4 microchip laser serves as the injecting seed source, providing a tunable single-frequency power of up to 40 mW. The ring laser emits a single-frequency power of 17.2 W with a Gaussian beam profile and a beam propagation factor of M2<1.1. A 60-mm-long periodically poled MgO-doped LiNbO3 crystal is used to generate the second harmonic in a single-pass scheme. Up to 5.7 W at 671.1 nm with a Gaussian shaped beam profile and a beam propagation factor of M2<1.2 are obtained, which is approximately twice the power of previously reported lasers. This work opens possibilities in cold atoms experiments with lithium, allowing the use of larger ensembles in magneto-optical traps or higher diffraction orders in atomic beam interferometers.

References

May 25, 2002·Applied Optics·Ignacio E OlivaresFrancisco J Duarte
Jan 12, 2008·Optics Letters·R S ConroyB D Sinclair
Jun 4, 2008·Physical Review Letters·Holger MüllerSteven Chu
Nov 1, 1989·Optics Letters·C D NaborsR L Byer

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Citations

Aug 10, 2017·Optics Express·Norman KretzschmarChristophe Salomon
Dec 28, 2019·Optics Express·Francisco R FontaKenneth M O'Hara

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