Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2330001(2021)
Performance Comparison of Pulsed and Continuous Quantum Cascade Lasers in Nitric Oxide Detection
Figures & Tables(8)
Fig. 3. Received signal waveforms of absorption peak of 4×10-5 m nitric oxide in the two systems. (a) Pulsed QCL system;(b) continuous QCL system
Fig. 4. Measurement curves of nitric oxide for two systems. (a) Pulsed QCL system; (b) continuous QCL system
Fig. 5. Measured results of background noise introduced by Etalon interference effect in two systems
Table 1. Analytical performance comparison of two systems
View tableTable 1. Analytical performance comparison of two systems
Parameter Pulsed QCL Continuous QCL Measurement range 0‒1400 0‒300 Linear range 0‒500 0‒300 Limit of detection 4.61 2.11
Table 2. Influence on measurement baseline by optical noise and electrical noise
View tableTable 2. Influence on measurement baseline by optical noise and electrical noise
Parameter Pulsed QCL system Continuous QCL system Average value of etalon 46.0 17.1 Optical noise 16.9 13.9 Electrical noise 1.08 0.70
Table 3. Comparison of other performance of the two systems
View tableTable 3. Comparison of other performance of the two systems
Parameter Pulsed QCL system Continuous QCL system Minimal bandwidth of photodetectors /MHz 120 0.2 Spectrum resolution /nm 0.32 0.01 Tuning range /nm 20 28 Peak optical power /mW 180 60 Time for single measurement /s 0.01（1000 average） 0.2 Average power consumption /W 0.31 2.0
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Zhenhan Li, Yue Yu, Rui Guo. Performance Comparison of Pulsed and Continuous Quantum Cascade Lasers in Nitric Oxide Detection[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2330001
Paper Information
Category: Spectroscopy
Received: Feb. 23, 2021
Accepted: Mar. 24, 2021
Published Online: Nov. 19, 2021
The Author Email: Li Zhenhan (li.zh@reyintech.com.cn)
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