Under CopyrightSowade, RositaRositaSowadeKießling, JensJensKießlingBreunig, IngoIngoBreunig2022-03-0426.11.20132013https://publica.fraunhofer.de/handle/publica/23379210.24406/publica-fhg-233792Optical parametric oscillators (OPOs) are widely tunable and thus turn out as very flexible light sources. Until recently, OPOs for the visible frequency range were commercially available as pulsed systems only. In this article, two concepts are presented, which pave the way into the visible spectrum for continuous-wave OPOs.ennonlinear opticscw laser lightvisible lightoptical parametric oscillatorsOPO535journal article