Meiqi ZHAO, Wei ZHOU, Di WANG, Yan LYU, Yushuang LI, Yu PU, Dong LI, Qidong FENG, Shuxian CHEN, Yilang LUO. Optimization analysis of optoelectronic parameters of laser telemetry systems for hydrogen leakage detection in hydrogen-involved equipment[J]. Journal of Applied Optics, 2024, 45(6): 1219
- Journal of Applied Optics
- Vol. 45, Issue 6, 1219 (2024)
Fig. 1. Hydrogen telemetry TDLAS system
Fig. 2. Light source module
Fig. 3. Diagram of laser radiation transmission model of non-cooperative target surface
Fig. 4. Module design of open optical path
Fig. 5. Data detection module
Fig. 6. Output frequency
Fig. 7. Centre frequency
Fig. 8. Absorbance ln(I0/It)
Fig. 9. Detector received light intensity It
Fig. 10. Second harmonic signal
Fig. 11. Backward reflected laser power on surface of common non-cooperative targets at different detection distances
Fig. 12. Relations of light intensity received by detector and F number (changing diameters of pupil)
Fig. 13. Relations of light intensity received by detector and F number (changing focal length)
Fig. 14. Second harmonic signals at different scanning amplitudes
Fig. 15. Second harmonic signals at different scanning frequencies
Fig. 16. Optimized laser-echo incident power for different materials at different detection distances
Fig. 17. Second harmonic signals at different concentrations
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Table 1. Parameters of material surface properties
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