Kolano, M.M.KolanoGräf, B.B.GräfWeber, S.S.WeberMolter, D.D.MolterFreymann, G. vonG. vonFreymann2022-03-052022-03-052018https://publica.fraunhofer.de/handle/publica/25297910.1364/OL.43.0013512-s2.0-85043998399We demonstrate a polarization-multiplexed, single-laser system for terahertz (THz) time-domain spectroscopy without an external delay line. The fiber laser emits two pulse trains with independently adjustable repetition rates, utilizing only one laser-active section and one pump diode. With a standard fiber-coupled THz setup and a polarization-multiplexed optical amplifier, we are able to measure transients with a spectral bandwidth of 1.5 THz and a dynamic range of 50 dB in a measurement time of 1 s. Based on the novel laser architecture, we call this new approach single-laser polarization-controlled optical sampling, or SLAPCOPS.en003535006519journal article