Two-micron Wavelength Dual-Comb Spectrometer Using a New Design of Dispersion-Controlled Highly Nonlinear Fibre.

In this paper, we present an all-fibered dual-comb spectrometer that uses a new design of dispersion-controlled highly nonlinear fibre. This fibre allows us to efficiently convert light through four-wave mixing from 1.55 to 2 micron, which is a spectral region suited for the detection of pollutants such as CO 2 or N 2 O. Experimental measurements of these components in pure and mixed forms are performed in this study and have shown a very good agreement with the HITRAN database.