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BETA
Foltynowicz, AleksandraORCID iD iconorcid.org/0000-0002-6191-7926
Alternative names
Publications (10 of 53) Show all publications
Lu, C., Vieira, F. S., Schmidt, F. M. & Foltynowicz, A. (2019). Near-Infrared Continuous-Filtering Vernier Spectroscopy in a Flame. In: Conference on Lasers and Electro-Optics: . Paper presented at Conference on Lasers and Electro-Optics (CLEO), San Jose, California, United States, 5-10 May, 2019. IEEE, Article ID SM2N.5.
Open this publication in new window or tab >>Near-Infrared Continuous-Filtering Vernier Spectroscopy in a Flame
2019 (English)In: Conference on Lasers and Electro-Optics, IEEE, 2019, article id SM2N.5Conference paper, Published paper (Refereed)
Abstract [en]

A continuous-filtering Vernier spectrometer based on an Er:fiber femtosecond laser was developed to acquire broadband H2O and OH spectra in a premixed CH4/air flame with 25 ms time resolution and percent precision on concentrations retrieval.

Place, publisher, year, edition, pages
IEEE, 2019
Series
Conference on Lasers and Electro-Optics, ISSN 2160-9020
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-163709 (URN)10.1364/CLEO_SI.2019.SM2N.5 (DOI)000482226301121 ()2-s2.0-85068128969 (Scopus ID)978-1-943580-57-6 (ISBN)
Conference
Conference on Lasers and Electro-Optics (CLEO), San Jose, California, United States, 5-10 May, 2019
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-10-16Bibliographically approved
Sadiek, I., Mikkonen, T., Vainio, M., Toivonen, J. & Foltynowicz, A. (2019). Optical Frequency Comb Photoacoustic Spectroscopy. In: Conference on Lasers and Electro-Optics: . Paper presented at Conference on Lasers and Electro-Optics (CLEO), San Jose, California, United States, 5-10 May, 2019. IEEE, Article ID SW3L.5.
Open this publication in new window or tab >>Optical Frequency Comb Photoacoustic Spectroscopy
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2019 (English)In: Conference on Lasers and Electro-Optics, IEEE, 2019, article id SW3L.5Conference paper, Published paper (Refereed)
Abstract [en]

We combine for the first time a mid-infrared optical frequency comb Fourier transform spectrometer with cantilever-enhanced photoacoustic detection and measure high-resolution broadband spectra of the fundamental band of methane in a few milliliter sample volume.

Place, publisher, year, edition, pages
IEEE, 2019
Series
Conference on Lasers and Electro-Optics, ISSN 2160-9020
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-163710 (URN)10.1364/CLEO_SI.2019.SW3L.5 (DOI)000482226301156 ()2-s2.0-85068148158 (Scopus ID)978-1-943580-57-6 (ISBN)
Conference
Conference on Lasers and Electro-Optics (CLEO), San Jose, California, United States, 5-10 May, 2019
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-10-16Bibliographically approved
Lu, C., Vieira, F. S., Schmidt, F. M. & Foltynowicz, A. (2019). Time-resolved continuous-filtering Vernier spectroscopy of H2O and OH radical in a flame. Optics Express, 27(21), 29521-29533
Open this publication in new window or tab >>Time-resolved continuous-filtering Vernier spectroscopy of H2O and OH radical in a flame
2019 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 27, no 21, p. 29521-29533Article in journal (Refereed) Published
Abstract [en]

We use broadband near-infrared continuous-filtering Vernier spectroscopy (CF-VS) for time-resolved detection of H2O and OH radical in a premixed CH4/air flat flame. The CF-VS spectrometer is based on a femtosecond Er:fiber laser, an external cavity that contains the flame, and a detection system comprising a rotating diffraction grating and photodetectors. Spectra of H2O and OH radical around 1570 nm are continuously recorded with 6.6 GHz spectral resolution, 4.0 x 10-7 cm-1 absorption sensitivity, and 25 ms time resolution, while the fuel-air equivalence ratio is periodically modulated with a square wave. The concentrations of the two analytes are retrieved with percent level precision by a fit of a Vernier model to each spectrum spanning 13 nm. The temporal profiles of both concentrations in each modulation cycle are repeatable and the steady-state concentration levels are in good agreement with predictions based on one-dimensional simulations of a static flat flame. The robust CF-VS spectrometer opens up for quantitative monitoring of multiple products of time-varying combustion processes with relatively simple data acquisition procedures.

Place, publisher, year, edition, pages
Optical Society of America, 2019
Keywords
Acoustooptic modulators, Cavity ring down spectroscopy, Coupling efficiency, Diffraction gratings, Fourier transform spectroscopy, Polarization maintaining fibers
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-164253 (URN)10.1364/OE.27.029521 (DOI)000489954500006 ()31684212 (PubMedID)
Funder
Knut and Alice Wallenberg Foundation, KAW 2015.0159
Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-11-11Bibliographically approved
Rutkowski, L., Foltynowicz, A., Schmidt, F. M., Johansson, A. C., Khodabakhsh, A., Kyuberis, A. A., . . . Tennyson, J. (2018). An experimental water line list at 1950 K in the 6250–6670 cm−1 region. Journal of Quantitative Spectroscopy and Radiative Transfer, 205, 213-219
Open this publication in new window or tab >>An experimental water line list at 1950 K in the 6250–6670 cm−1 region
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2018 (English)In: Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN 0022-4073, E-ISSN 1879-1352, Vol. 205, p. 213-219Article in journal (Refereed) Published
Abstract [en]

An absorption spectrum of (H2O)-O-16 at 1950 K is recorded in a premixed methane/air flat flame using a cavity-enhanced optical frequency comb-based Fourier transform spectrometer. 2417 absorption lines are identified in the 6250-6670 cm(-1) region with an accuracy of about 0.01 cm(-1). Absolute line intensities are retrieved using temperature and concentration values obtained by tunable diode laser absorption spectroscopy. Line assignments are made using a combination of empirically known energy levels and predictions from the new POKAZATEL variational line list. 2030 of the observed lines are assigned to 2937 transitions, once blends are taken into account. 126 new energy levels of (H2O)-O-16 are identified. The assigned transitions belong to 136 bands and span rotational states up to J = 27.

Keywords
Water, Absorption, Fourier transform spectroscopy, Optical cavity, Frequency comb, Calculations
National Category
Atom and Molecular Physics and Optics Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:umu:diva-141519 (URN)10.1016/j.jqsrt.2017.10.016 (DOI)000417665000023 ()
Available from: 2017-11-06 Created: 2017-11-06 Last updated: 2018-06-09Bibliographically approved
Johansson, A. C., Rutkowski, L., Filipsson, A., Hausmaninger, T., Zhao, G., Axner, O. & Foltynowicz, A. (2018). Broadband calibration-free cavity-enhanced complex refractive index spectroscopy using a frequency comb. Optics Express, 26(16), 20633-20648
Open this publication in new window or tab >>Broadband calibration-free cavity-enhanced complex refractive index spectroscopy using a frequency comb
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2018 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 26, no 16, p. 20633-20648Article in journal (Refereed) Published
Abstract [en]

We present broadband cavity-enhanced complex refractive index spectroscopy (CE-CRIS), a technique for calibration-free determination of the complex refractive index of entire molecular bands via direct measurement of transmission modes of a Fabry-Perot cavity filled with the sample. The measurement of the cavity transmission spectrum is done using an optical frequency comb and a mechanical Fourier transform spectrometer with sub-nominal resolution. Molecular absorption and dispersion spectra (corresponding to the imaginary and real parts of the refractive index) are obtained from the cavity mode broadening and shift retrieved from fits of Lorentzian profiles to the individual cavity modes. This method is calibration-free because the mode broadening and shift are independent of the cavity parameters such as the length and mirror reflectivity. In this first demonstration of broadband CE-CRIS we measure simultaneously the absorption and dispersion spectra of three combination bands of CO2 in the range between 1525 nm and 1620 nm and achieve good agreement with theoretical models. This opens up for precision spectroscopy of the complex refractive index of several molecular bands simultaneously. 

Place, publisher, year, edition, pages
Optical Society of America, 2018
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-151397 (URN)10.1364/OE.26.020633 (DOI)000440803600079 ()30119372 (PubMedID)
Funder
Swedish Research Council, 2016-03593Swedish Research Council, 2015-04374Knut and Alice Wallenberg Foundation, KAW 2015.0159
Available from: 2018-09-04 Created: 2018-09-04 Last updated: 2018-11-13Bibliographically approved
Johansson, A. C., Filipsson, A., Rutkowski, L., Maslowski, P. & Foltynowicz, A. (2018). CO2 Line Parameter Retrieval Beyond the Voigt Profile Using Comb-Based Fourier Transform Spectroscopy. In: Conference on Lasers and Electro-Optics: . Paper presented at Conference on Lasers and Electro-Optics (CLEO, Science and innovations), San Jose, CA, USA, May 13-18, 2018.. Optical Society of America
Open this publication in new window or tab >>CO2 Line Parameter Retrieval Beyond the Voigt Profile Using Comb-Based Fourier Transform Spectroscopy
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2018 (English)In: Conference on Lasers and Electro-Optics, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

We measure absorption spectra of the CO213 band at 1.57 μm using optical frequency comb Fourier transform spectroscopy with sub-nominal resolution and retrieve line shape parameters using multiline fitting with the speed-dependent Voigt profile.

Place, publisher, year, edition, pages
Optical Society of America, 2018
Series
OSA Technical Digest
Keywords
Spectroscopy, Fourier transforms (300.6300), Absorption (300.1030), Line shapes and shifts (020.3690).
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-153175 (URN)10.1364/CLEO_SI.2018.STu3P.6 (DOI)
Conference
Conference on Lasers and Electro-Optics (CLEO, Science and innovations), San Jose, CA, USA, May 13-18, 2018.
Funder
Knut and Alice Wallenberg Foundation, KAW 2015.0159Swedish Research Council, 2016-03593
Note

Paper STu3P.6

Available from: 2018-11-12 Created: 2018-11-12 Last updated: 2018-11-14Bibliographically approved
Rutkowski, L., Masłowski, P., Johansson, A. C., Khodabakhsh, A. & Foltynowicz, A. (2018). Optical frequency comb Fourier transform spectroscopy with sub-nominal resolution and precision beyond the Voigt profile. Journal of Quantitative Spectroscopy and Radiative Transfer, 204, 63-73
Open this publication in new window or tab >>Optical frequency comb Fourier transform spectroscopy with sub-nominal resolution and precision beyond the Voigt profile
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2018 (English)In: Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN 0022-4073, E-ISSN 1879-1352, Vol. 204, p. 63-73Article in journal (Refereed) Published
Abstract [en]

Broadband precision spectroscopy is indispensable for providing high fidelity molecular parameters for spectroscopic databases. We have recently shown that mechanical Fourier transform spectrometers based on optical frequency combs can measure broadband high-resolution molecular spectra undistorted by the instrumental line shape (ILS) and with a highly precise frequency scale provided by the comb. The accurate measurement of the power of the comb modes interacting with the molecular sample was achieved by acquiring single-burst interferograms with nominal resolution matched to the comb mode spacing. Here we describe in detail the experimental and numerical steps needed to achieve sub-nominal resolution and retrieve ILS-free molecular spectra, i.e. with ILS-induced distortion below the noise level. We investigate the accuracy of the transition line centers retrieved by fitting to the absorption lines measured using this method. We verify the performance by measuring an ILS-free cavity-enhanced low-pressure spectrum of the 3ν1 + ν3 band of CO2 around 1575 nm with line widths narrower than the nominal resolution. We observe and quantify collisional narrowing of absorption line shape, for the first time with a comb-based spectroscopic technique. Thus retrieval of line shape parameters with accuracy not limited by the Voigt profile is now possible for entire absorption bands acquired simultaneously.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Optical frequency combs, Fourier transform spectroscopy, High resolution spectroscopy, Line shapes
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-142443 (URN)10.1016/j.jqsrt.2017.09.001 (DOI)000414880500009 ()
Available from: 2017-12-06 Created: 2017-12-06 Last updated: 2018-11-13Bibliographically approved
Sadiek, I., Mikkonen, T., Vainio, M., Toivonen, J. & Foltynowicz, A. (2018). Optical frequency comb photoacoustic spectroscopy. Physical Chemistry, Chemical Physics - PCCP, 20(44), 27849-27855
Open this publication in new window or tab >>Optical frequency comb photoacoustic spectroscopy
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2018 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 20, no 44, p. 27849-27855Article in journal (Refereed) Published
Abstract [en]

We report the first photoacoustic detection scheme using an optical frequency comb—optical frequency comb photoacoustic spectroscopy (OFC-PAS). OFC-PAS combines the broad spectral coverage and the high resolution of OFCs with the small sample volume of cantilever-enhanced PA detection. In OFC-PAS, a Fourier transform spectrometer (FTS) is used to modulate the intensity of the exciting comb source at a frequency determined by its scanning speed. One of the FTS outputs is directed to the PA cell and the other is measured simultaneously with a photodiode and used to normalize the PA signal. The cantilever-enhanced PA detector operates in a non-resonant mode, enabling detection of a broadband frequency response. The broadband and the high-resolution capabilities of OFC-PAS are demonstrated by measuring the rovibrational spectra of the fundamental C–H stretch band of CH4, with no instrumental line shape distortions, at total pressures of 1000 mbar, 650 mbar, and 400 mbar. In this first demonstration, a spectral resolution two orders of magnitude better than previously reported with broadband PAS is obtained, limited by the pressure broadening. A limit of detection of 0.8 ppm of methane in N2 is accomplished in a single interferogram measurement (200 s measurement time, 1000 MHz spectral resolution, 1000 mbar total pressure) for an exciting power spectral density of 42 μW/cm−1. A normalized noise equivalent absorption of 8 × 10−10 W cm−1 Hz−1/2 is obtained, which is only a factor of three higher than the best reported with PAS based on continuous wave lasers. A wide dynamic range of up to four orders of magnitude and a very good linearity (limited by the Beer–Lambert law) over two orders of magnitude are realized. OFC-PAS extends the capability of optical sensors for multispecies trace gas analysis in small sample volumes with high resolution and selectivity.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-154040 (URN)10.1039/c8cp05666h (DOI)000450660400011 ()30398249 (PubMedID)
Funder
Knut and Alice Wallenberg Foundation, KAW 2015.0159
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
Rutkowski, L., Johansson, A. C., Khodabakhsh, A. & Foltynowicz, A. (2017). Broadband and High Resolution Direct Measurement of Cavity Resonances. In: 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC): . Paper presented at Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), JUN 25-29, 2017, Munich, GERMANY. IEEE
Open this publication in new window or tab >>Broadband and High Resolution Direct Measurement of Cavity Resonances
2017 (English)In: 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), IEEE, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Summary form only given. Optical frequency combs offer unprecedented combination of broad bandwidth and high resolution and their coupling to enhancement cavities provides high sensitivity for spectroscopic measurements. Here we use a frequency-comb-based Fourier transform spectrometer (FTS) to measure the narrow resonances of a high-finesse cavity over a bandwidth of 100 nm around 1.55 μm and derive the group delay dispersion (GDD) of the cavity mirrors with precision below 1 fs 2 from the cavity resonance frequencies. We do this using a method that allows precise sampling of the comb intensities using an FTS with nominal resolution matched to the comb repetition rate (f rep ) [1, 2], and we demonstrate that sub-MHz resolution is achieved.

Place, publisher, year, edition, pages
IEEE, 2017
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-152157 (URN)10.1109/CLEOE-EQEC.2017.8087461 (DOI)000432564601222 ()978-1-5090-6736-7 (ISBN)
Conference
Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), JUN 25-29, 2017, Munich, GERMANY
Funder
Swedish Research Council, 2016-03593Swedish Foundation for Strategic Research , ICA12-0031Knut and Alice Wallenberg Foundation, KAW 2015.0159
Available from: 2018-10-01 Created: 2018-10-01 Last updated: 2018-10-01Bibliographically approved
Khodabakhsh, A., Rutkowski, L., Morville, J., Johansson, A. C., Soboń, G. & Foltynowicz, A. (2017). Cavity-Enhanced Continuous-Filtering Vernier Spectroscopy at 3.3 mu m using a Femtosecond Optical Parametric Oscillator. In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC): . Paper presented at 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference, Munich Germany, 25–29 June 2017 (pp. CH_2_2). IEEE
Open this publication in new window or tab >>Cavity-Enhanced Continuous-Filtering Vernier Spectroscopy at 3.3 mu m using a Femtosecond Optical Parametric Oscillator
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2017 (English)In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), IEEE , 2017, p. CH_2_2-Conference paper, Published paper (Refereed)
Abstract [en]

Optical frequency comb spectroscopy in the mid-infrared fingerprint region combines broad spectral bandwidth with high detection sensitivity and allows simultaneous detection of trace amounts of many molecular species. We have recently demonstrated a continuous-filtering Vernier spectrometer based on a mid-infrared optical frequency comb and an enhancement cavity for fast and sensitive detection of CH4 [1]. Here we present an improved, fully automatized and frequency calibrated continuous-filtering Vernier spectrometer, schematically shown in Fig. 1(a). The comb source is a doubly resonant optical parametric oscillator (DROPO) based on an orientation-patterned GaAs crystal synchronously pumped by a Tm:fiber femtosecond laser (125 MHz repetition rate, frep). The signal comb (3.1–3.4 µm, 30 mW) is mode matched to a 60-cm long Vernier enhancement cavity with a finesse of ~350 at 3.25 μm, placed in an enclosure that can be filled with the gas sample. The output mirror is attached to a PZT and mounted on a translation stage. When the cavity free spectral range is perfectly matched to twice the frep (250 MHz) every other signal comb mode is transmitted through the cavity. By detuning the cavity length from this perfect match position the cavity resonances act as a filter and transmit groups of comb modes called Vernier orders [2]. A diffraction grating mounted on a galvo-scanner separates these orders after the cavity and the chosen order is sent to the detection system. The Vernier order is tuned across the signal comb spectrum by scanning the cavity length (at 20 Hz) and the grating is rotated synchronously to fix the order in space and allow acquisition of the entire spectrum in 25 ms. Any residual mismatch between the cavity length scan and the grating rotation is compensated by a feedback loop acting on the frep of the pump laser and the PZT of the Vernier cavity [2]. A Fabry-Perot etalon is used for frequency calibration of the spectrometer. Figure 1(b) shows in black the normalized transmission spectrum of a sample containing 5.0 ppm CH4 and 160 ppm water. The red and blue curves show the corresponding fit of the Vernier spectrum [3] of CH4 and water, respectively, calculated using Voigt profiles, line parameters from the HITRAN database, and the experimentally determined cavity finesse. The figure of merit of the spectrometer is 1×10−9cm−1 Hz−1∕2 per spectral element and multiline fitting yields minimum detectable concentration of CH4 of 2 ppb in 25 ms, translating into 400 ppt Hz−1∕2 Since the spectrum of the signal comb covers the fundamental C-H stretch transitions we expect low detection limits for other hydrocarbons as well. In conclusion, mid-infrared comb-based continuous-filtering Vernier spectroscopy allows fast and highly sensitive measurement of broadband absorption spectra using a robust and compact detection system.

Place, publisher, year, edition, pages
IEEE, 2017
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-155053 (URN)000432564600616 ()978-1-5090-6736-7 (ISBN)
Conference
2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference, Munich Germany, 25–29 June 2017
Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-07Bibliographically approved
Projects
Anmälan om utnyttjande av återvändarbidrag för beviljade postdoktorstipendier [2012-00069_VR]; Umeå UniversityCavity-enhanced optical frequency comb spectroscopy - A technique for sensitive simultaneous detection of molecules in gas phase. [2012-03650_VR]; Umeå UniversityPrecision Fourier Transform Spectroscopy with Optical Frequency Combs [2016-03593_VR]; Umeå University
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6191-7926

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