24-watts second-harmonic generation in ppZnO:LN ridge waveguide for lithium laser cooling | Zendy

Norman Kretzschmar | Zendy; Ulrich Eismann | Zendy; Franz Sievers | Zendy; Frédéric Chevy | Zendy; Christophe Salomon | Zendy

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24-watts second-harmonic generation in ppZnO:LN ridge waveguide for lithium laser cooling

Author(s) -

Norman Kretzschmar,

Ulrich Eismann,

Franz Sievers,

Frédéric Chevy,

Christophe Salomon

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.014840

Subject(s) - laser , optics , second harmonic generation , materials science , diode , waveguide , laser cooling , lithium triborate , lithium niobate , energy conversion efficiency , harmonic , lithium (medication) , ridge , optoelectronics , physics , medicine , paleontology , quantum mechanics , biology , endocrinology

We present a simple all-solid-state laser source emitting 2.4 W of single-frequency light at 671 nm for laser cooling of lithium atoms. It is based on a diode-pumped solid-state laser, which is frequency doubled in a ppZnO:LN ridge waveguide with an internal doubling efficiency of 54%. We develop a simple theory for the thermal effects we observed at elevated fundamental powers, and compare the setup to a more efficient but more complex one with an external resonant frequency doubling cavity providing 5.2 W at 671 nm.

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