Wolf, SebastianSebastianWolfReiser, PatrickPatrickReiserKießling, JensJensKießlingKühnemann, FrankFrankKühnemann2022-03-142022-03-142019https://publica.fraunhofer.de/handle/publica/40563310.1109/CLEOE-EQEC.2019.8873250Nonlinear-optical upconversion has recently been under intense investigation as a method for the detection of infrared radiation [1]. By upconversion of mid-infrared (MIR) signals to the spectral range suitable for near infrared detectors (mainly silicon-based), higher detection sensitivities [2,3] and acquisition bandwidths [3,4] can be achieved.enlaser excitationLaser NoiseNonlinear-Optical Upconversionquantum cascade laserspectroscopy621conference paper