Spectroscopy, Atomic and Molecular Physics, and Optics
40
Scopus Publications
191
Scholar Citations
6
Scholar h-index
5
Scholar i10-index
Scopus Publications
Long-wave mid-infrared cavity-enhanced frequency comb spectroscopy of cold, complex molecules Negar Baradaran, Dominik Charczun, Tanay Nambiar, Meijun Zou, Kevin F. Lee, Martin E. Fermann, Marissa L. Weichman Optics Express, 2026 We report the development of an instrument for cavity-enhanced absorption spectroscopy of the fundamental rovibrational transitions of molecules in the long-wave mid-infrared (LWIR) region from 6500 to 10000 nm. Our setup combines an LWIR frequency comb, a high-finesse optical enhancement cavity, a cryogenic buffer gas cooling cell, and a Fourier transform interferometer to obtain broadband, high-resolution, and high-sensitivity molecular absorption spectra. Here, we showcase the capabilities of this setup by presenting the gas-phase LWIR spectra of the ν 6 band of ethane and the ν 10 band of the gauche conformer of ethanol near 7200 nm under both room temperature and cryogenic conditions.
Direct frequency comb cavity ringdown spectroscopy: Enhancing sensitivity and precision Romain Dubroeucq, Dominik Charczun, Piotr Masłowski, Lucile Rutkowski APL Photonics, 2025 We present a novel approach to cavity ringdown spectroscopy utilizing an optical frequency comb as the direct probe of the Fabry–Pérot cavity, coupled with a time-resolved Fourier transform spectrometer for parallel retrieval of ringdown events. Our method achieves a high spectral resolution over a broad range, enabling precision measurements of cavity losses and absorption line shapes with enhanced sensitivity. A critical advancement involves a stabilization technique ensuring complete extinction of comb light without compromising cavity stabilization. We demonstrate the capabilities of our system through precision spectroscopy of carbon monoxide rovibrational transitions perturbed by argon.
Pure frequency-based dispersive spectroscopy A. Cygan, K. Bielska, D. Charczun, G. Kowzan, A. Nishiyama, P. Wcisło, S. Wójtewicz, M. Zaborowski, P. Masłowski, D. Lisak, R. Ciuryło, A. J. Fleisher, K. A. Gillis, J. T. Hodges, T. Voumard, T. Wilidi, T. Herr, V. Brasch Journal of Physics Conference Series, 2024 Dispersion spectroscopy based on frequency measurement of the high finesse optical cavity mode shifts induced by the presence of a gas medium with absorption resonances is an attractive alternative to standard absorptive spectroscopy. The main advantage of such pure frequency-based dispersive spectroscopy technique is the unique combination of sensitivity and accuracy. High sensitivity is ensured by high finesse optical cavities providing extremely long effective optical paths. On the other hand, high accuracy is provided by frequency measurement cavity mode shift. This makes this technique free from systematic errors coming from the non-linearity of light intensity measurements, which is one of the limiting factors in typical absorptive spectroscopy. We review several realizations of dispersive spectroscopy in high finesse optical cavities from Doppler-free to broadband. These techniques are especially useful for studying weak molecular transitions applicable in testing fundamental physics, gas metrology, spectroscopic thermometry, and a new generation of spectroscopic databases.
Sensitive Fourier-transform cavity ring down spectroscopy based on a near-infrared frequency comb European Quantum Electronics Conference Eqec 2023 in Proceedings Conference on Lasers and Electro Optics Europe CLEO Europe 2023 and European Quantum Electronics Conference Eqec 2023 Part of Conference on Lasers and Electro Optics Europe CLEO Europe 2023 and European Quantum Electroni, 2023
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb spectroscopy Akiko Nishiyama, Grzegorz Kowzan, Dominik Charczun, Piotr Masłowski CLEO Applications and Technology CLEO A and T 2023, 2023 We applied a mid-infrared frequency comb-based Fourier-transform spectroscopy to line-shape study of fundamental vibrational band of CO perturbed by N2. Our frequency comb-based spectrometer enables to provide precise spectroscopic parameters in mid-infrared region.
Lineshape study of CO perturbed by N2 with midinfrared frequency comb spectroscopy 2023 Conference on Lasers and Electro Optics CLEO 2023, 2023
Sensitive Fourier-transform cavity ring down spectroscopy based on a near-infrared frequency comb Romain Dubroeucq, Dominik Charczun, Piotr Masłowski, Lucile Rutkowski 2023 Conference on Lasers and Electro Optics Europe and European Quantum Electronics Conference CLEO Europe Eqec 2023, 2023 Multiplexed cavity ring-down spectroscopy (CRDS) is challenging to achieve as it requires a detection scheme able to retrieve many undistorted exponential decays simultaneously [1]. We recently demonstrated Fourier transform CRDS (FT-CRDS) based on an optical frequency comb source and a time-resolved Fourier transform spectrometer (FTS) [2]. In this proof-of-concept experiment, the frequency comb was locked to a CRDS cavity using the Pound-Drever-Hall (PDH) technique, to ensure a quasi-continuous comb light transmission through the cavity. The decays were synchronized with the movement of the fast-scanning FTS, allowing to retrieve a 3D spectrum containing the untangled decays at each spectral element. The cavity was characterized by a moderate finesse of 2,000, far below standard reflectivity used for CRDS, and the comb mode absolute frequencies were not stabilized. Here, we revise the locking scheme, as depicted in Fig. 1(a): the offset frequency of the Erbium comb is stabilized to a reference radiofrequency while the repetition rate is phase-locked to a continuous wave laser emitting at 1550 nm, which in turn is locked to a cavity mode using the Pound-Drever-Hall technique. Absolute frequency stability is ensured by actively stabilizing the repetition rate to a tunable reference acting on the piezo-actuator glued to one of the cavity mirrors. The cavity transmission is sent to the FTS where it propagates parallel to a frequency-stabilized HeNe laser whose interferogram is used for optical path difference (OPD) calibration. This reference is also used to trigger the acousto-optic modulator switching off the comb light, allowing retrieval of cavity decays with a controlled OPD step. Fast Fourier transformation of the comb interferograms obtained at different delays after the triggers yields the ring-down events in spectral domain. Finally, these exponential decays are fitted individually to retrieve the CRDS spectrum, which is directly proportional to the absorption coefficient of the analyte, without requiring knowledge of the cavity length or finesse. In addition, as the comb frequencies are stable in time, averaging of successive measurements is now possible.
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb spectroscopy Akiko Nishiyama, Grzegorz Kowzan, Dominik Charczun, Piotr Masłowski CLEO Science and Innovations CLEO S and I 2023, 2023 We applied a mid-infrared frequency comb-based Fourier-transform spectroscopy to line-shape study of fundamental vibrational band of CO perturbed by N2. Our frequency comb-based spectrometer enables to provide precise spectroscopic parameters in mid-infrared region.
Dual-comb cavity ring-down spectroscopy Daniel Lisak, Dominik Charczun, Akiko Nishiyama, Thibault Voumard, Thibault Wildi, Grzegorz Kowzan, Victor Brasch, Tobias Herr, Adam J. Fleisher, Joseph T. Hodges, Roman Ciuryło, Agata Cygan, Piotr Masłowski Scientific Reports, 2022
Dual-comb cavity-mode width and shift spectroscopy D. Charczun, A. Nishiyama, G. Kowzan, A. Cygan, T. Voumard, T. Wildi, T. Herr, V. Brasch, D. Lisak, P. Masłowski Measurement Journal of the International Measurement Confederation, 2022
Comb-based Fourier-transform spectrometry for broadband measurements of absorption and dispersion Optics Infobase Conference Papers, 2019
Optical Cavity Mode Measurements at Hz-Level Precision with a Comb-Based VIPA Spectrometer 2018 Conference on Lasers and Electro Optics CLEO 2018 Proceedings, 2018
Application of Cavity-Enhanced Comb-Based Fourier-Transform Spectroscopy to Line Shape Study of Carbon Monoxide in Argon 2018 Conference on Lasers and Electro Optics CLEO 2018 Proceedings, 2018
Long-wave mid-infrared cavity-enhanced frequency comb spectroscopy of cold, complex molecules N Baradaran, D Charczun, T Nambiar, M Zou, KF Lee, ME Fermann, ... Optics Express 34 (4), 6751-6767 , 2026 2026 Citations: 2
Broadband birefringence spectroscopy with sub-kHz precision M Prinz, D Charczun, M Bober, M Narożnik, P Morzyński, U Galander, ... arXiv preprint arXiv:2508.21545 , 2025 2025
Direct frequency comb cavity ringdown spectroscopy: Enhancing sensitivity and precision R Dubroeucq, D Charczun, P Masłowski, L Rutkowski APL Photonics 10 (2) , 2025 2025 Citations: 4
Pure frequency-based dispersive spectroscopy A Cygan, K Bielska, D Charczun, G Kowzan, A Nishiyama, P Wcisło, ... Journal of Physics: Conference Series 2889 (1), 012061 , 2024 2024
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb-based Fourier-transform spectroscopy A Nishiyama, G Kowzan, D Charczun, R Ciuryło, N Coluccelli, ... Measurement 227, 114273 , 2024 2024 Citations: 6
Application of mid-infrared frequency comb-based Fourier-transform spectroscopy to precise line-shape study of CO perturbed by N2 A Nishiyama, G Kowzan, D Charczun, R Ciuryło, P Masłowski Fourier Transform Spectroscopy, FTh2A. 3 , 2023 2023
High-Precision Measurement of Birefringent Mode Splitting in an Ultrastable High-Finesse Optical Cavity with Crystalline Mirrors M Prinz, LW Perner, OH Heckl, GW Truong, GD Cole, M Bober, ... The European Conference on Lasers and Electro-Optics, ce_3_2 , 2023 2023
Sensitive Fourier-transform cavity ring down spectroscopy based on a near-infrared frequency comb R Dubroeucq, D Charczun, P Masłowski, L Rutkowski European Quantum Electronics Conference, ed_4_2 , 2023 2023 Citations: 1
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb spectroscopy A Nishiyama, G Kowzan, D Charczun, P Masłowski CLEO: Science and Innovations, JTh2A. 87 , 2023 2023 Citations: 1
Broadband cavity ring-down Fourier-transform spectroscopy L Rutkowski, R Dubroeucq, D Charczun, P Maslowski EPJ Web of Conferences 287, 07001 , 2023 2023
Comb-based FTIR spectroscopy of CO perturbed by N2 at 4.6 µm A Nishiyama, G Kowzan, D Charczun, R Ciuryło, P Masłowski EPJ Web of Conferences 287, 07030 , 2023 2023
Electro-optical Dual-Comb Spectroscopy: Application to Cavity Ring-Down, Mode Width and Mode Dispersion Measurements D Charczun, D Lisak, A Nishiyama, T Voumard, T Wildi, G Kowzan, ... Conference on Lasers and Electro-Optics/Pacific Rim, CThP6F_07 , 2022 2022
Fourier-transform spectroscopy with a mid-infrared frequency comb for line-shape study of CO-Ar A Nishiyama, G Kowzan, D Charczun, P Masłowski 2022 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 1-2 , 2022 2022
Dual-comb cavity ring-down spectroscopy D Lisak, D Charczun, A Nishiyama, T Voumard, T Wildi, G Kowzan, ... Scientific reports 12 (1), 2377 , 2022 2022 Citations: 49
Dual-comb cavity-mode width and shift spectroscopy D Charczun, A Nishiyama, G Kowzan, A Cygan, T Voumard, T Wildi, ... Measurement 188, 110519 , 2022 2022 Citations: 13
Frequency-based dispersion Lamb-dip spectroscopy in a high finesse optical cavity K Bielska, A Cygan, M Konefał, G Kowzan, M Zaborowski, D Charczun, ... Optics Express 29 (24), 39449-39460 , 2021 2021 Citations: 13
Dual-comb cavity-enhanced absorption and dispersion spectroscopy from cavity mode widths and mode shifts measurement D Charczun, A Nishiyama, G Kowzan, A Cygan, T Voumard, T Wildi, ... 2021 Conference on Lasers and Electro-Optics Europe & European Quantum … , 2021 2021
Optical frequency comb-based cavity-enhanced Fourier-transform spectroscopy: Application to collisional line-shape study A Nishiyama, G Kowzan, D Charczun, RS Trawiński, P Masłowski Chinese Journal of Chemical Physics 33 (1), 23-30 , 2020 2020 Citations: 7
基于光梳的腔增强傅里叶变换光谱: 在碰撞线形研究中的应用 (英文) A Nishiyama, G Kowzan, D Charczun, RS Trawiński, P Maslowski Chinese Journal of Chemical Physics 1 , 2020 2020
Mirror Characterization and Complex Refractive Index Measurements with Hz-level Resolution Fourier Transform Spectrometry D Charczun, G Kowzan, A Nishiyama, P Staniszewski, A Cygan, D Lisak, ... Frontiers in Optics, JTu4A. 6 , 2019 2019
MOST CITED SCHOLAR PUBLICATIONS
Dual-comb cavity ring-down spectroscopy D Lisak, D Charczun, A Nishiyama, T Voumard, T Wildi, G Kowzan, ... Scientific reports 12 (1), 2377 , 2022 2022 Citations: 49
High-accuracy and wide dynamic range frequency-based dispersion spectroscopy in an optical cavity A Cygan, P Wcisło, S Wójtewicz, G Kowzan, M Zaborowski, D Charczun, ... Optics Express 27 (15), 21810-21821 , 2019 2019 Citations: 46
Broadband optical cavity mode measurements at Hz-level precision with a comb-based VIPA spectrometer G Kowzan, D Charczun, A Cygan, RS Trawiński, D Lisak, P Masłowski Scientific reports 9 (1), 8206 , 2019 2019 Citations: 42
Dual-comb cavity-mode width and shift spectroscopy D Charczun, A Nishiyama, G Kowzan, A Cygan, T Voumard, T Wildi, ... Measurement 188, 110519 , 2022 2022 Citations: 13
Frequency-based dispersion Lamb-dip spectroscopy in a high finesse optical cavity K Bielska, A Cygan, M Konefał, G Kowzan, M Zaborowski, D Charczun, ... Optics Express 29 (24), 39449-39460 , 2021 2021 Citations: 13
Optical frequency comb-based cavity-enhanced Fourier-transform spectroscopy: Application to collisional line-shape study A Nishiyama, G Kowzan, D Charczun, RS Trawiński, P Masłowski Chinese Journal of Chemical Physics 33 (1), 23-30 , 2020 2020 Citations: 7
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb-based Fourier-transform spectroscopy A Nishiyama, G Kowzan, D Charczun, R Ciuryło, N Coluccelli, ... Measurement 227, 114273 , 2024 2024 Citations: 6
Broadband and high resolution measurements of cavity loss and dispersion DA Charczun, G Kowzan, A Cygan, RS Trawiński, D Lisak, P Masłowski Photonics Letters of Poland 10 (2), 48-50 , 2018 2018 Citations: 5
Direct frequency comb cavity ringdown spectroscopy: Enhancing sensitivity and precision R Dubroeucq, D Charczun, P Masłowski, L Rutkowski APL Photonics 10 (2) , 2025 2025 Citations: 4
Long-wave mid-infrared cavity-enhanced frequency comb spectroscopy of cold, complex molecules N Baradaran, D Charczun, T Nambiar, M Zou, KF Lee, ME Fermann, ... Optics Express 34 (4), 6751-6767 , 2026 2026 Citations: 2
Sensitive Fourier-transform cavity ring down spectroscopy based on a near-infrared frequency comb R Dubroeucq, D Charczun, P Masłowski, L Rutkowski European Quantum Electronics Conference, ed_4_2 , 2023 2023 Citations: 1
Line-shape study of CO perturbed by N2 with mid-infrared frequency comb spectroscopy A Nishiyama, G Kowzan, D Charczun, P Masłowski CLEO: Science and Innovations, JTh2A. 87 , 2023 2023 Citations: 1
Fourier-Transform Frequency Comb Cavity Mode Spectroscopy at Hz Level for Trace Gas Measurements D Charczun, G Kowzan, A Nishiyama, M Debus, P Huke, D Tomaszewska, ... Optical Sensors, SeTu4E. 7 , 2018 2018 Citations: 1
Optical Cavity Mode Measurements at Hz-Level Precision With a Comb-Based VIPA Spectrometer G Kowzan, D Charczun, A Cygan, RS Trawiński, D Lisak, P Masłowski CLEO: Science and Innovations, STu3N. 8 , 2018 2018 Citations: 1
Broadband birefringence spectroscopy with sub-kHz precision M Prinz, D Charczun, M Bober, M Narożnik, P Morzyński, U Galander, ... arXiv preprint arXiv:2508.21545 , 2025 2025
Pure frequency-based dispersive spectroscopy A Cygan, K Bielska, D Charczun, G Kowzan, A Nishiyama, P Wcisło, ... Journal of Physics: Conference Series 2889 (1), 012061 , 2024 2024
Application of mid-infrared frequency comb-based Fourier-transform spectroscopy to precise line-shape study of CO perturbed by N2 A Nishiyama, G Kowzan, D Charczun, R Ciuryło, P Masłowski Fourier Transform Spectroscopy, FTh2A. 3 , 2023 2023
High-Precision Measurement of Birefringent Mode Splitting in an Ultrastable High-Finesse Optical Cavity with Crystalline Mirrors M Prinz, LW Perner, OH Heckl, GW Truong, GD Cole, M Bober, ... The European Conference on Lasers and Electro-Optics, ce_3_2 , 2023 2023
Broadband cavity ring-down Fourier-transform spectroscopy L Rutkowski, R Dubroeucq, D Charczun, P Maslowski EPJ Web of Conferences 287, 07001 , 2023 2023
Comb-based FTIR spectroscopy of CO perturbed by N2 at 4.6 µm A Nishiyama, G Kowzan, D Charczun, R Ciuryło, P Masłowski EPJ Web of Conferences 287, 07030 , 2023 2023
