Continuous-wave optical parametric terahertz source R Sowade, I Breunig, IC Mayorga, J Kiessling, C Tulea, V Dierolf, K Buse Optics express 17 (25), 22303-22310, 2009 | 85 | 2009 |

Cascaded optical parametric oscillations generating tunable terahertz waves in periodically poled lithium niobate crystals J Kiessling, R Sowade, I Breunig, K Buse, V Dierolf Optics Express 17 (1), 87-91, 2009 | 63 | 2009 |

Fourier transform infrared spectroscopy with visible light C Lindner, S Wolf, J Kiessling, F Kühnemann Optics express 28 (4), 4426-4432, 2020 | 48 | 2020 |

High power and spectral purity continuous-wave photonic THz source tunable from 1 to 4.5 THz for nonlinear molecular spectroscopy J Kießling, I Breunig, PG Schunemann, K Buse, KL Vodopyanov New Journal of Physics 15 (10), 105014, 2013 | 48 | 2013 |

Influence of the pump threshold on the single-frequency output power of singly resonant optical parametric oscillators R Sowade, I Breunig, J Kiessling, K Buse Applied Physics B 96, 25-28, 2009 | 36 | 2009 |

Nonlinear interferometer for Fourier-transform mid-infrared gas spectroscopy using near-infrared detection C Lindner, J Kunz, SJ Herr, S Wolf, J Kießling, F Kühnemann Optics Express 29 (3), 4035-4047, 2021 | 35 | 2021 |

Pump-enhanced optical parametric oscillator generating continuous wave tunable terahertz radiation J Kiessling, F Fuchs, K Buse, I Breunig Optics letters 36 (22), 4374-4376, 2011 | 33 | 2011 |

Upconversion-enabled array spectrometer for the mid-infrared, featuring kilohertz spectra acquisition rates S Wolf, J Kiessling, M Kunz, G Popko, K Buse, F Kühnemann Optics express 25 (13), 14504-14515, 2017 | 32 | 2017 |

Self-gated mid-infrared short pulse upconversion detection for gas sensing S Wolf, T Trendle, J Kiessling, J Herbst, K Buse, F Kühnemann Optics express 25 (20), 24459-24468, 2017 | 29 | 2017 |

Temperature-dependent Sellmeier equation for the extraordinary refractive index of 5 mol. % MgO-doped LiNbO_{3} in the terahertz rangeJ Kiessling, K Buse, I Breunig JOSA B 30 (4), 950-952, 2013 | 28 | 2013 |

Method for producing terahertz electromagnetic carrier waves I Breunig, K Buse, J Kiessling, B Knabe, R Sowade US Patent 8,554,083, 2013 | 15 | 2013 |

Generation of tunable continuous-wave terahertz radiation by photomixing the signal waves of a dual-crystal optical parametric oscillator I Breunig, J Kiessling, R Sowade, B Knabe, K Buse New journal of Physics 10 (7), 073003, 2008 | 11 | 2008 |

Hybridly-pumped continuous-wave optical parametric oscillator I Breunig, J Kiessling, B Knabe, R Sowade, K Buse Optics Express 16 (8), 5662-5666, 2008 | 10 | 2008 |

Cw laser light tunable from blue to red: OPOs pave the way R Sowade, J Kießling, I Breunig | 8 | 2013 |

Tunable dual-comb spectrometer for mid-infrared trace gas analysis from 3 to 4.7 µm L Nitzsche, J Goldschmidt, J Kiessling, S Wolf, F Kühnemann, ... Optics Express 29 (16), 25449-25461, 2021 | 7 | 2021 |

Ein adaptives Verfahren zur Hörgeräte-Anpassung mittels Lautheitsskalierung (ScalAdapt) J Kießling, M Schubert Hörakustik 30, 4-15, 1995 | 7 | 1995 |

Note: Coherent detection of terahertz radiation employing a continuous wave optical parametric source J Kiessling, R Sowade, IC Mayorga, K Buse, I Breunig Review of Scientific Instruments 82 (2), 2011 | 5 | 2011 |

Lithium niobate: wavelength and temperature dependence of the thermo-optic coefficient in the visible and near infrared S Fieberg, L Streit, J Kiessling, P Becker, L Bohaty, F Kühnemann, K Buse Nonlinear Frequency Generation and Conversion: Materials, Devices, and …, 2015 | 4 | 2015 |

One Light Source—All Colors: Optical parametric oscillators generate tunable, continuous‐wave light spanning the visible spectrum R Sowade, J Kießling, I Breunig Optik & Photonik 8 (1), 46-49, 2013 | 4 | 2013 |

Accurate, high-resolution dispersive Fourier-transform spectroscopy with undetected photons C Lindner, J Kunz, SJ Herr, J Kiessling, S Wolf, F Kühnemann Optics Continuum 1 (2), 189-196, 2022 | 3 | 2022 |