Improving Resolution of Dual-Comb Gas Detection Using Periodic Spectrum Alignment Method.

ABSTRACT: Dual-comb spectroscopy has been an infusive spectroscopic tool for gas detection due to its high resolution, high sensitivity, and fast acquisition speed over a broad spectral range without any mechanical scanning components. However, the complexity and cost of high-performance dual-comb spectroscopy are still high for field-deployed applications. To solve this problem, we propose a simple frequency domain post-processing method by extracting the accurate position of a specific absorption line frame by frame. After aligning real-time spectra and averaging for one second, the absorbance spectrum of H¹³C¹⁴N gas in the near-infrared is obtained over 1.1 THz spectral range. By using this method, the standard deviation of residual error is only ~0.002, showing great agreem

SUBMITTER: Yu H 

PROVIDER: S-EPMC7866286 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature