Direct sampling of femtosecond electric-field waveforms generated in an optical parametric oscillator

• DOI: 10.1364/opticaopen.24282781
• Publication Date: 2023-10-11T08:55:08Z
• Authors: Konstantin Vodopy...; Hannes Kempf; Andrey Muraviev; Felix Breuning; Peter Schunemann; Ron Tenne; Alfred Leitenstorfer
• Keywords: Optical parametric amplifier

Detecting the electric-field waveform of an optical pulse, from terahertz to visible spectral domain, provides a complete picture for laser-source characterization and has great potential sensitive spectroscopy. To perform field-resolved measurements, pulse train must consist identical pulses – including equal carrier-envelope phase (CEP). However, due limited selection broadband gain media, producing CEP-stable sources in desired range requires nonlinear energy conversion processes that are often inefficient. In this work, we demonstrate efficient fiber-based telecom-wavelength into mid-infrared (MIR) source through application multi-pass resonant system, parametric oscillator (OPO). degenerate OPO, conditions ensure stability pump is transferred signal without any external feedback mechanism. Employing electro-optic sampling, provide temporal measurement electric field OPO output, first time. We expect such MIR will benefit classical spectroscopy as well time-domain quantum electro-dynamics experiments.