Infrared and Laser Engineering, Volume. 54, Issue 3, 20240535(2025)
Research on multi-cycle low-rank reconstruction analysis method for trace N2O detection
Fig. 1. QCL absorption spectrum signal of N2O with a concentration of 100 ppb. (a) Number of detection points is
Fig. 2. Second harmonic signal graph calculated using orthogonal phase-locking amplification, with the peak points representing the N2O concentration marked by red circles
Fig. 3. Signal matrix constructed using the multi-cycle low-rank reconstruction method. (a) Before low-rank optimization; (b) After low-rank optimization
Fig. 4. Comparison of the ranks in the multi-cycle low-rank reconstruction signal matrix
Fig. 6. Second harmonic signal graph obtained using the multi-cycle low-rank reconstruction method, with the peak points representing the N2O concentration marked by red circles.
Fig. 7. (a) Fitting curve of the normalized second harmonic peak values from the orthogonal phase-locking amplifier with different N2O gas concentrations; (b) Fitting curve of the normalized second harmonic peak values from the multi-cycle low-rank reconstruction method with different N2O gas concentrations
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Xiaoran FU, Feng GAO, Xiaopeng YANG, Junjie JIA, Yi SUN, Yunpeng YANG, Xiangyun MA, Qifeng LI. Research on multi-cycle low-rank reconstruction analysis method for trace N2O detection[J]. Infrared and Laser Engineering, 2025, 54(3): 20240535
Category: Laser
Received: Nov. 18, 2024
Accepted: --
Published Online: Apr. 8, 2025
The Author Email: Xiangyun MA (mxy1994@tju.edu.cn)