可调谐半导体激光吸收光谱技术作为一种稳健的非接触测量技术，在燃烧和推进等恶劣流场的诊断中具有广泛的应用。开发了一种基于水吸收的可调谐半导体激光传感器，用于同时测量超声速地面测试设备的温度和速度，应用扫描波长吸收谱和免标定的波长调制谱可实现绝对测量。传感器在2.5 kg/s质量流量的直连式超燃试验台上开展了工程试验研究，试验马赫数为2.0，总压为5.3~5.7 atm(1 atm=1.01325×105 Pa)，总温为1100 K~1700 K，速度和温度的测量结果与模型预测值具有较好的一致性，验证了传感器设计的有效性，为工程应用提供了有力的技术支撑。

Tunable diode laser absorption spectroscopy (TDLAS), as a robust non-contact measurement technology, has exhensive applications in the diagnosis, for harsh environments commonly experienced in combustion and propulsion flows. A tunable diode laser sensor, which is based on water absorption, has been developed to measure temperature and velocity in a supersonic ground-test facility simultaneously. Scanned-wavelength direct absorption spectroscopy and calibration-free wavelength modulation spectroscopy are employed to enable the absolute measurement. The sensor is tested at the direct-connect supersonic combustion facility which operates at mass flux of 2.5 kg/s, Mach number of 2.0, total pressure from 5.3 to 5.7 atm (1 atm=1.01325×105 Pa) and total temperature from 1100 K to 1700 K. The measured temperature and velocity agree well with the theoretical model, which validates the efficiency of the sensor design. The investigative results can provide the technique support for engineering applications.