Accurate knowledge of the line parameters of ammonia (NH₃) transitions is important for developing precise laser-based NH₃ sensors. We report the measurement of line-strengths and temperature-dependent broadening coefficients of NH₃ with N₂, air, Ar, and CO₂ for six transitions in the ν₂ fundamental band near 1103 cm⁻¹. The absorption feature contributed by the target transitions is of particular interest for combustion emission applications due to its strong absorbance and the minimal spectral interference from other species such as H₂O, CO_2, and NO_X. In this work, we measured NH₃ absorption spectra with different collisional partners at the temperature range of 296–573 K using a quantum cascade laser. Spectroscopic parameters were determined by conducting multi-line fitting of the measured spectra using the Galatry lineshape function due to the evident line narrowing effect. Our study will aid the development of mid-infrared NH₃ sensors particularly for high-temperature applications.

准确了解氨 (NH ₃ ) 跃迁的线参数对于开发精确的基于激光的 NH ₃传感器非常重要。_{我们报告了 NH 3}与 N ₂、空气、Ar 和 CO ₂在 1103 cm ^{-1附近的 ν} ₂基带中的六个跃迁的线强度和温度相关展宽系数的测量。由目标跃迁贡献的吸收特征对燃烧排放应用特别感兴趣，因为它具有强吸收性和来自其他物质（如 H ₂ O、CO ₂和 NO _X ）的最小光谱干扰。在这项工作中，我们测量了 NH_图3使用量子级联激光器在 296–573 K 温度范围内具有不同碰撞伙伴的吸收光谱。由于明显的线变窄效应，光谱参数是通过使用 Galatry 线形函数对测量光谱进行多线拟合来确定的。我们的研究将有助于开发特别适用于高温应用的中红外 NH _{3传感器。}