Yue Hou, Kejin Huang, Guanyi Yu, Pengquan Zhang. Development on high precision CO2 isotope measurement system based on infrared TDLAS technology[J]. Infrared and Laser Engineering, 2021, 50(4): 20200083
- Infrared and Laser Engineering
- Vol. 50, Issue 4, 20200083 (2021)
Fig. 1. Absorption lines of CO2 isotope at 4.3 μm
Fig. 2. Block diagram of the measuring system
Fig. 3. Schematic block diagram of temperature control system for MPGC
Fig. 4. Temperature control result
Fig. 5. Second harmonic signals of five different concentrations
Fig. 6. Peak values of the second harmonic signal of 13CO2 and 12CO2
Fig. 7. Allan variances of the measured results
Fig. 8. CO2 isotope measurement results within two hours
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