Wavelength modulation-direct absorption spectroscopy (WM-DAS) has been used to measure the absorption line shapes of the ${\mathrm{H}}_2\mathrm{O}$ transition at 7299.431 cm${}^{-1}$ and the CO transition at 4297.705 cm${}^{-1}$ perturbed by Ar, ${\mathrm{N}}_2$ and He. The foreign-gas broadening, narrowing and pressure-shift parameters were determined from various lineshape models at pressures from 1 to 100 kPa. The measured ${\mathrm{N}}_2$-broadening coefficients are the largest among the three perturbers and the measured ${\mathrm{N}}_2$- and Ar-pressure-shift coefficients are both negative while that for He is positive. The nonlinear pressure dependence of the velocity-changing rates for the Galatry and Rautian profiles and the speed-dependent coefficients for Speed-dependent Voigt profile were all observed for the 6 binary systems. The measured velocity-changing rates were all larger than the corresponding dynamic friction coefficients in ${\mathrm{H}}_2\mathrm{O}$-Ar/${\mathrm{N}}_2$/He while smaller than those in CO-Ar/${\mathrm{N}}_2$/He. The narrowing parameters were also retrieved and compared by taking both the Dicke narrowing and speed dependent effects into account. The partially Correlated quadratic Speed-dependent Hard-Collision profile was simulated and fit by the other simplified profiles to further validate the nonlinear behaviour of the narrowing parameters, which is consistent with the measured results.

波长调制直接吸收光谱 (WM-DAS) 已被用于测量吸收线形状 ${\mathrm{H}}_2\mathrm{哦}$ 7299.431 厘米处的过渡${}^{-1}$ 和 CO 跃迁在 4297.705 cm${}^{-1}$ 受到 Ar 的干扰， ${\mathrm{N}}_2$和他。从 1 到 100 kPa 压力下的各种线型模型确定外来气体展宽、变窄和压力偏移参数。被测${\mathrm{N}}_2$-broadening 系数在三个扰动和实测中最大 ${\mathrm{N}}_2$- 和 Ar 压力位移系数均为负，而 He 为正。对于 6 个二元系统，Galatry 和 Rautian 剖面的速度变化率的非线性压力依赖性以及与速度相关的 Voigt 剖面的速度相关系数都被观察到。测得的速度变化率均大于相应的动摩擦系数${\mathrm{H}}_2\mathrm{哦}$-Ar/${\mathrm{N}}_2$/He虽然比CO-Ar中的小/${\mathrm{N}}_2$/他。还通过考虑 Dicke 变窄和速度相关效应来检索和比较变窄参数。部分相关的二次速度相关硬碰撞剖面被其他简化剖面模拟和拟合，以进一步验证变窄参数的非线性行为，这与测量结果一致。