Time-resolved Fourier transform spectroscopy with 0.25 cm−1 spectral and <10−7 s time resolution in the visible region

The development of a new time-resolved Fourier transform spectrometer that is capable of 0.25 cm−1 spectral resolution and better than 10−7 s temporal resolution in the visible is reported. The time-resolved capability of the spectrometer is achieved by coupling a step-scan interferometer to a transient digitizer/laser system. The operation of the spectrometer is described in detail, and scattered light and laser-induced fluorescence spectra from an I2 gas cell are presented to demonstrate the temporal and spectral resolution of the spectrometer.