Open Access24-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.