A high-resolution quantum cascade spectrometer was developed to study nitrogen dioxide (NO₂) line intensities near 6.2 μm. The spectral region ranging from 1629.7 cm⁻¹ to 1632.5 cm⁻¹, which is suitable for the in situ laser sensing of trace NO₂ in the atmosphere, was investigated using a thermoelectrically cooled continuous-wave distributed feed-back quantum cascade laser. Forty-three lines of nitrogen dioxide were experimentally studied within the pressure region ranging between 0 and 90 mbar. The measured intensities were thoroughly compared to the latest HITRAN16 database, a good agreement within ±3% was obtained for most of the established lines.

开发了一种高分辨率量子级联光谱仪，以研究接近6.2μm的二氧化氮（NO ₂）线强度。使用热电冷却连续波分布反馈量子级联激光器研究了适用于大气中痕量NO _2的原位激光传感的1629.7 cm ^-1至1632.5 cm ^-1的光谱区域。在0至90 mbar的压力范围内，对43条二氧化氮进行了实验研究。将测得的强度与最新的HITRAN16数据库进行了彻底比较，大多数已建立的品系均获得了±3％的良好一致性。