Multiplex spectroscopy of jet-cooled NO2

We report the multiplexing (use in tandem) of laser-induced fluorescence (LIF) and degenerate four-wave mixing (DFWM) spectroscopies to probe jet-cooled NO2 near 487 nm. We find that the multiplexing of these methods can be used to determine relative line strength factors and the ratio of populations in different energy levels, and to elucidate the transition dipole moment dependence of the DFWM signal.