We present the implementation of a direct comb spectrometer capable of resolving the single-comb mode of a ∼200-MHz pulse repetition rate Cr:ZnSe mode-locked laser at 2.4 μm. The spectrometer is based on the combination of a scanning Fabry-P´erot micro-cavity resonator with a Finesse of 15000 and a diffraction reflecting grating. We demonstrate its application in high-precision spectroscopy of acetylene (C2H2) and deuterated methane (CDH3) at 2.4 μm, over 3 THz bandwidth sampled at 200 MHz and with a frequency resolution of 100 kHz limited only by the comb mode linewidth.
High-resolution direct-comb spectrometer at 2.4 μm
Vicentini E.;Rosina A.;Nobis M.;Canella F.;Wang Y.;Laporta P.;Galzerano G.
2022-01-01
Abstract
We present the implementation of a direct comb spectrometer capable of resolving the single-comb mode of a ∼200-MHz pulse repetition rate Cr:ZnSe mode-locked laser at 2.4 μm. The spectrometer is based on the combination of a scanning Fabry-P´erot micro-cavity resonator with a Finesse of 15000 and a diffraction reflecting grating. We demonstrate its application in high-precision spectroscopy of acetylene (C2H2) and deuterated methane (CDH3) at 2.4 μm, over 3 THz bandwidth sampled at 200 MHz and with a frequency resolution of 100 kHz limited only by the comb mode linewidth.File in questo prodotto:
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