Open AccessFourier transform and grating-based spectroscopy with a mid-infrared supercontinuum source for trace gas detection in fruit quality monitoring
Author(s) -
Khalil Eslami Jahromi,
Mohammadreza Nematollahi,
R. Krebbers,
Muhammad Ali Abbas,
Amir Khodabakhsh,
Frans J. M. Harren
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.418072
Subject(s) - supercontinuum , spectrometer , optics , trace gas , grating , fourier transform spectroscopy , fourier transform infrared spectroscopy , spectral resolution , materials science , spectroscopy , infrared , fourier transform , imaging spectrometer , remote sensing , physics , spectral line , optical fiber , quantum mechanics , astronomy , meteorology , photonic crystal fiber , geology
We present a multi-species trace gas sensor based on a fast, compact home-built Fourier transform spectrometer (FTS) combined with a broadband mid-infrared supercontinuum (SC) source. The spectrometer covers the spectral bandwidth of the SC source (2 - 4 µm) and provides a best spectral resolution of 1 GHz in 6 seconds. It has a detection sensitivity of a few hundred of ppbv Hz -1/2 for different gas species. We study the performance of the developed spectrometer in terms of precision, linearity, long-term stability, and multi-species detection. We use the spectrometer for measuring fruit-produced volatiles under different atmospheric conditions and compare the performance with a previously developed scanning grating-based spectrometer.