Article Dans Une Revue Optics Express Année : 2023

Long wavelength mid-infrared multi-gases spectroscopy using tunable single-mode slot waveguide quantum cascade laser

Résumé

Single-mode tunable quantum cascade lasers (QCLs) are promising for high-resolution and highly sensitive trace gases sensing across the mid-infrared (MIR) region. We report on the development of a tunable single-mode slot waveguide QCL array in the long wavelength part of the MIR regime (>12 µm). This laser array exhibits a tuning range of around 12 cm -1 , from 735.3 to 747.3 cm -1 . Using this developed single-mode tunable QCL, we demonstrate individual gas sensing, yielding the detection limit of 940 ppb and 470 ppb for acetylene and o-xylene, respectively. To verify the potential of the developed QCL array in multi-species gas detection, laser absorption measurements of two mixed gases of acetylene and o-xylene were conducted, showing the absorption features of the corresponding gases agree well with the theoretical predictions.

Dates et versions

hal-04969161 , version 1 (27-02-2025)

Identifiants

Citer

Yuhao Jin, Fangyuan Sun, Jinghao Li, Chuan Seng Tan, Kian Hua Tan, et al.. Long wavelength mid-infrared multi-gases spectroscopy using tunable single-mode slot waveguide quantum cascade laser. Optics Express, 2023, 31 (17), pp.27543. ⟨10.1364/OE.495160⟩. ⟨hal-04969161⟩
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