Measurements of new absorption lines of acetylene at 1.53 μm using a tunable diode laser absorption spectrometer

- Acetylene spectra at 1.53 μm were measured using a TDLAS spectrometer at Doppler-broadening-limited resolution.
- Total 22 new weak lines were precisely identified for the first time.
- The reported results will be valuable to complete the spectroscopic databases of acetylene.

A new investigation of acetylene absorption lines between 6526.5 and 6531.5 cm− 1 spectral region was performed by using a long-path absorption cell based tunable diode laser absorption spectrometer. The multi-spectrum fitting procedure has been applied to these intensive absorption lines of acetylene within the spectral range of particular interest to recover the line parameters. Line intensities and line positions of total 42 lines of acetylene were reported, including 22 new lines precisely identified for the first time. The reported results will be valuable to complete the spectroscopic databases of acetylene, and also be useful for upgrading our newly developed TDLAS sensor system for industrial C2H2 gas detection.

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