Speed-dependent Voigt lineshape parameter database from dual frequency comb measurements at temperatures up to 1305 K. Part II: Argon-broadened H2O absorption, 6801–7188 cm−1

Highlights: • We study 487 transitions of water vapor perturbed by Argon in the spectral range 6801–7188 cm⁻¹ from 296–1305 K and 100–600 Torr. • We report 487 argon-broadening coefficients, 202 argon-broadening temperature-dependence exponents, and 353 speed-dependence coefficients. • We further report 448 argon-shift coefficients, and 220 argon-shift temperature-dependence exponents. • We present figures and trend equations to facilitate the use of this data beyond the spectral range explored. We report argon-broadened water vapor transition parameters and their temperature dependence based on measured spectra spanning 6801–7188 cm⁻¹ from a broad-bandwidth, high-resolution dual frequency comb spectrometer. The 25 collected spectra of 2% water vapor in argon ranged from 296 K to 1305 K with total pressure spanning 100 Torr to 600 Torr. A multispectrum fitting routine was used in conjunction with a quadratic speed-dependent Voigt profile to extract broadening and shift parameters, and a power-law temperature-dependence exponent for both. The measurements represent the first broad bandwidth, argon-broadened water vapor absorption study, and are an important step toward a foreign-gas-perturbed, high-temperature database developed using advanced lineshape profiles.