Optical frequency combs (OFCs) 1,2 offer significant advantages for Fourier transform spectrometers (FTS) 3,4 compared to thermal sources 5,6 . The high spectral brightness and spatial and temporal coherence of combs allow acquisition of broadband molecular spectra with high signal-tonoise ratios in recording times orders of magnitude shorter than traditional Fourier transform infrared (FTIR) spectrometers and removes the need to collimate light from isotropic sources. Furthermore,

• weak quadrupole S(2) 2-0 line in self-perturbed D2 is measured • collisional line-shape effects and energy of this rovibrational transition are calculated • the velocity-changing collisions are handled with the hardsphere collisional kernel • the experimental and theoretical pressure broadening and shift are consistent within 5 • we observe 3.4 sigma discrepancy between experimental and theoretical line position

No abstract