We present the first systematic study of self-broadened CO₂ line shape parameters in the 00031 ← 00001 and 01131 ← 01101 bands at high temperature. We report temperature-dependent broadening coefficients and pressure shift coefficients for more than 40 transitions in the 00031 ← 00001 band, and 75 transitions in the 01131 ← 01101 hot band. The majority of these parameters have never been measured at high temperature. The new parameters are determined from 12 spectra measured with a broadband, high-resolution dual frequency comb absorption spectrometer in a high-temperature gas cell from room temperature to 980 K. We fit the measured spectra using a multispectrum fitting approach to derive line shape parameters with both a Voigt and speed-dependent Voigt profile. We compare the measured parameters to calculated line shape parameters as well as to the new parameter set developed for the HITRAN2020 database. The new measurements demonstrate strong agreement with HITRAN2020 (within 1% in some cases), and provide new measurements of the temperature dependence of the broadening and pressure shift coefficient that will improve the accuracy of the database at high temperature. We extend our results to high |m| transitions using a set of empirical models for the broadening and pressure shift coefficients, which we fit to our data and validate for high-temperature transitions up to |m| = 98. We use these models to construct a set of database files that can be used to supplement the HITRAN database for self-broadened CO₂ in the 6800 – 7000 cm^-1 region. These new parameters significantly improve the accuracy of absorption models for high-temperature CO₂ in this frequency range, and also provide useful data to test and improve methods used to calculate CO₂ line shape parameters.

我们首次对自展宽的 CO _{2 进行}系统研究高温下 00031 ← 00001 和 01131 ← 01101 波段的线形参数。我们报告了 00031 ← 00001 带中 40 多个跃迁和 01131 ← 01101 热带中 75 个跃迁的温度相关展宽系数和压力位移系数。大多数这些参数从未在高温下测量过。新参数是从在室温到 980 K 的高温气室中使用宽带、高分辨率双频梳状吸收光谱仪测量的 12 个光谱确定的。我们使用多光谱拟合方法拟合测量的光谱以导出线形参数具有 Voigt 和与速度相关的 Voigt 配置文件。我们将测量参数与计算出的线形参数以及为 HITRAN2020 数据库开发的新参数集进行比较。新测量表明与 HITRAN2020 具有很强的一致性（在某些情况下在 1% 以内），并提供了展宽和压力偏移系数的温度依赖性的新测量，这将提高数据库在高温下的准确性。我们将结果扩展到高 |米| 使用一组用于加宽和压力位移系数的经验模型进行转换，我们将其拟合到我们的数据并验证高温转换高达 | 米| = 98. 我们使用这些模型构建了一组数据库文件，可用于补充 HITRAN 数据库中 6800 – 7000 cm ^-1区域的自展宽 CO ₂。这些新参数显着提高了该频率范围内高温 CO ₂吸收模型的准确性，也为测试和改进用于计算 CO ₂线形参数的方法提供了有用的数据。