Measurement of H2O concentration by tunalbe laser absorption spectroscopy technique with a Tm:YAP solid-state laser

作者：Long, Liu; Xie, Wen-Qiang; Yang, Xiao-Tao^*

来源：Optik, 2016, 127(20): 8277-8280.

DOI：10.1016/j.ijleo.2016.06.001

• Tm:YAP
• Tunable.
• Absorption spectroscopy
• Concentration

This work investigates a tunable laser absorption spectroscopy technique for the H2O concentration by a Tm:YAP solid-state laser. The output wavelength of Tm:YAP laser is tuned by a birefringence filter and an F-P etalon in the laser cavity. The tuning range is from 1910 nm to 1914 nm, the tuning frequency is 1 Hz. With the tunable Tm:YAP laser, we realize a concentration resolution of 10 ppb. Different concentrations of H2O vapor are use to test the precision of the system. A maximum relative error of 0.8% is realized. At the same time, we calculate the maximum absolute error to be 0.8 ppm. Up to the authors' knowledge, it is the first time to report a tunable laser absorption spectroscopy for the gas concentration measurement by a Tm-doped laser.

• 出版日期2016
• 单位哈尔滨工程大学