High-resolution direct-comb spectrometer at 2.4 μm

Vicentini, E. and Rosina, A. and Nobis, M. and Canella, F. and Wang(, Y. (2022) High-resolution direct-comb spectrometer at 2.4 μm. Il nuovo cimento C, 45 (4). pp. 1-7. ISSN 1826-9885

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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.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	06 Sep 2022 11:39
Last Modified:	06 Sep 2022 11:39
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21995

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