Zhiyun Zhou, Debao Li, Su Wan, Yiwei Shi. Durability of Waveguide Absorption Cell for a Spectroscopic Gas Sensing System[J]. Acta Optica Sinica, 2020, 40(19): 1906002
- Acta Optica Sinica
- Vol. 40, Issue 19, 1906002 (2020)
Fig. 1. Spectroscopic gas sensing system based on FTIR and hollow waveguide
Fig. 2. Fingerprint absorption of gases and typical loss spectra of waveguides. (a) Normalized absorption coefficient; (b) loss spectra of waveguides
Fig. 3. Typical loss spectra of PI/Ag, FCP/Ag, and PS/Ag hollow waveguides
Fig. 4. Schematic diagram of sample gas preparation by bubbling method
Fig. 5. Standard absorption of HN3 and loss spectra of hollow waveguides before and after injecting HN3 sample gas. (a) Ag waveguide; (b) AgI/Ag waveguide; (c) SiO2/Ag waveguide; (d) COP/Ag waveguide
Fig. 6. High resolution loss spectra of Ag waveguide filled with wet HN3 gas
Fig. 7. Loss spectra of hollow waveguides with HCl sample gas, and standard absorption of HCl is added for comparison in the insets. (a) AgI/Ag waveguide; (b) Ag waveguide
Fig. 8. Original loss spectra and loss spectra of the hollow waveguide before and after importing the HCl sample gas. (a) AgI/Ag waveguide; (b) Ag waveguide
Fig. 9. Absorption spectrum of cyclohexane volatiles
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Table 1. Durability of waveguide to diluted hydrochloric acid liquid
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Table 2. Summary of characteristics of the waveguide for anti-corrosion
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