Design of NO2 photoacoustic sensor with high reflective mirror based on low power blue diode laser
Jin Hua-Wei1, 2, 6, Xie Pin-Hua1, 3, 4, 5, †, Hu Ren-Zhi1, 2, ‡, Huang Chong-Chong1, 2, Lin Chuan1, Wang Feng-Yang1, 2
       

Curves of the cross section versus wavelength of NO2, H2O, and diode laser spectrum.