Article
Optics
Zhaoyang Wen, Bo Peng, Ming Yan, Tingting Zheng, Qi Wen, Tingting Liu, Xinyi Ren, Kun Huang, Heping Zeng
Summary: This study demonstrates mid-infrared time-stretch spectroscopy using coincidently-pumped nonlinear frequency conversion for efficient generation and detection. The method allows for high-speed recording of broad-spectrum mid-infrared spectra with high signal-to-noise ratio. It reveals fast spectral dynamics in laser-induced liquid evaporation and offers a new opportunity for analyzing chemicals under a thick water layer.
LASER & PHOTONICS REVIEWS
(2023)
Review
Biochemistry & Molecular Biology
Charlotte Delrue, Sander De Bruyne, Marijn M. Speeckaert
Summary: Traditional renal biomarkers are insensitive for early detection of kidney disease. Infrared spectroscopy offers a label-free and non-destructive method for quick and inexpensive diagnosis of kidney disorders. This review provides an overview of the applications of near- and mid-infrared spectroscopy in patients with acute kidney injury and chronic kidney disease.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
Farid Ullah Khan, Aldo Moreno-Oyervides, Oscar Elias Bonilla-Manrique, Pedro Martin-Mateos
Summary: High-performance hyperspectral imaging is in high demand due to its wide range of capabilities. However, traditional systems have limitations in resolving narrow spectral features. In this study, we introduce the first hyperspectral dual-comb imaging system with sub-GHz optical resolutions and fast acquisition rates in the mid-infrared region.
OPTICS AND LASERS IN ENGINEERING
(2023)
Review
Food Science & Technology
Carlotta Ceniti, Anna Antonella Spina, Cristian Piras, Francesca Oppedisano, Bruno Tilocca, Paola Roncada, Domenico Britti, Valeria Maria Morittu
Summary: To ensure the safety and quality of milk, new tools have been developed to detect chemical contaminants, toxins, veterinary drugs, and adulteration of milk from different species. Mid-infrared spectroscopy and Fourier-transform infrared have been commonly used technologies for rapid screening of hazardous substances and confirmation of milk authenticity. These fingerprint methods can effectively determine the characteristics of raw materials without knowing the identity of each constituent, making them potential screening methods for adulteration detection. This paper reviews the latest advances in applying mid-infrared spectroscopy for the detection and quantification of adulterants, milk dilution, pathogenic bacteria, veterinary drugs, and hazardous substances in milk.
Article
Optics
Zhong Zuo, Chenglin Gu, Daowang Peng, Xing Zou, Yuanfeng Di, Lian Zhou, Daping Luo, Yang Liu, Wenxue Li
Summary: This study successfully demonstrates the generation of a highly mutually coherent dual mid-infrared comb spectrometer based on optical-optical modulation, allowing flexible tuning of center wavelength and parallel detection of multiple molecular species. It shows potential for applications outside the laboratory setting, such as open-path atmospheric gas sensing and industrial process monitoring.
PHOTONICS RESEARCH
(2021)
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Nanoscience & Nanotechnology
Lukasz A. Sterczewski, Tzu-Ling Chen, Douglas C. Ober, Charles R. Markus, Chadwick L. Canedy, Igor Vurgaftman, Clifford Frez, Jerry R. Meyer, Mitchio Okumura, Mahmood Bagheri
Summary: Chip-scale optical frequency combs have the potential to be used in broadband spectroscopy and chemical sensing in various fields. By using the Vernier technique, a compact cavity-enhanced chemical sensing system can be realized. The experimental results demonstrate the ability to detect the release of different substances with high resolution and fast response.
Article
Optics
Adrian Hjalten, Matthias Germann, Karol Krzempek, Arkadiusz Hudzikowski, Aleksander Gluszek, Dorota Tomaszewska, Grzegorz Sobon, Aleksandra Foltynowicz
Summary: In this study, a Fourier transform spectrometer was used for high-resolution broadband measurements of nitrous oxide, retrieving line center frequencies and upper state constants. The results showed excellent agreement with a recent study by AlSaif et al. using a comb-referenced quantum cascade laser. The origin of the hot band was determined with precision one order of magnitude better than previous work.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Spectroscopy
Jun Yang, Chunling Yin, Xu Miao, Xiangru Meng, Zhimin Liu, Leqian Hu
Summary: The study demonstrated the use of DRIFTS technology and chemometrics to detect Radix Astragali adulteration, showing effective distinction of adulteration levels. PLS-DA and LDA-KNN were the best classification methods with high accuracy rates.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Review
Automation & Control Systems
Maria Frizzarin, Antonio Bevilacqua, Bhaskar Dhariyal, Katarina Domijan, Federico Ferraccioli, Elena Hayes, Georgiana Ifrim, Agnieszka Konkolewska, Thach Le Nguyen, Uche Mbaka, Giovanna Ranzato, Ashish Singh, Marco Stefanucci, Alessandro Casa
Summary: This paper discusses a chemometric data analysis challenge held during the first edition of the International Workshop on Spectroscopy and Chemometrics, where participants aimed to build a calibration model for predicting milk quality traits using mid-infrared spectra. The approaches adopted by participants and the insights obtained from the analyses are outlined and critically discussed.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2021)
Article
Optics
Peter John Rodrigo, Lasse Hogstedt, Soren Michael Mork Friis, Lars Rene Lindvold, Peter Tidemand-Lichtenberg, Christian Pedersen
Summary: The novel MIR upconversion spectrometer (MIRUS) provides a record-high signal-to-noise ratio and a broad spectral coverage range, enabling operation in harsh environments. By utilizing broadband intracavity upconversion, MIRUS outperforms traditional FTIR systems with faster response rates and improved performance. Applications of MIRUS in gas sensing, plastic identification, and rapid photopolymerization monitoring have been successfully demonstrated.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Ceramics
Fangru Ma, Bo Wei, Jianjiang Wang, Abudoureheman Maierhaba, Lijuan Chen, Xian Li
Summary: The content of Na2O directly affects the ash fusion temperatures (AFTs) of coal ash. Experimental and simulation results show that Na+ ions attack the oxygen molecules in coal ash, altering the structure of the ash and leading to a decrease in AFTs.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Geochemistry & Geophysics
Sameeksha Mishra, Anup Krishna Prasad, Anubhav Shukla, Arya Vinod, Kumari Preety, Atul Kumar Varma
Summary: The carbon content of different types of coal affects its use in industries and thermal power generation. This study proposes using FTIR spectroscopy data to analyze the carbon content in coal samples as a potential alternative method. The results show that FTIR can accurately determine the carbon content in high-ash coals and has potential applications in various basins for high-ash coals, soil, and shale samples.
Article
Multidisciplinary Sciences
Mingchen Liu, Robert M. M. Gray, Luis Costa, Charles R. R. Markus, Arkadev Roy, Alireza Marandi
Summary: In this study, cross-comb spectroscopy is introduced and demonstrated in the mid-infrared as a variant of dual-comb spectroscopy. It provides enhanced performance and allows for the detection of mid-infrared spectral information using near-infrared detection.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Paul Kaufmann, Helen M. Chrzanowski, Aron Vanselow, Sven Ramelow
Summary: Mid-infrared spectroscopy is an important analytical technique that can be used for a variety of materials. However, there are technical limitations in this field, such as the large noise in mid-IR detectors and the complexity and cost of bright, broadband mid-IR light sources. In this study, we bypass these limitations by using non-degenerate, broadband photon pairs from spontaneous parametric down-conversion in a nonlinear interferometer. We demonstrate spectroscopy in the mid-IR using only a visible solid-state laser and a commercial near-infrared grating spectrometer. The results show short integration times, high signal-to-noise ratios, and high spectral resolution.
Article
Optics
Y. Leventoux, G. Granger, K. Krupa, A. Tonello, G. Millot, M. Ferraro, F. Mangini, M. Zitelli, S. Wabnitz, S. Fevrier, V Couderc
Summary: The study introduces a new space-time mapping technique for directly detecting the real-time evolution of beam intensity in graded index fibers and observes instant intrapulse nonlinear coupling processes among modes.
Article
Optics
Jeong Hyun Huh, Zaijun Chen, Edoardo Vicentini, Theodor W. Haensch, Nathalie Picque
Summary: This study conducted time-resolved near-infrared absorption spectroscopy of single non-repeatable transient events with a dual-comb interferometer, achieving high spectral resolution and up to 50 s of mutual coherence time without active stabilization system. The time resolution was as short as 100 ms in the experimental demonstration, enabling precise determination of rovibrational line parameters.
Article
Optics
Alix Malfondet, Alexandre Parriaux, Patrice Tchofo-Dinda, Guy Millot
Summary: Experimental measurement of the transfer function (TF) of a nonlinear optical loop mirror (NOLM) highlights the impact of dispersion effects and Kerr nonlinearity on the device.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Optics
Edoardo Vicentini, Zhenhai Wang, Kasper Van Gasse, Theodor W. Hansch, Nathalie Picque
Summary: In holography, using a large number of narrow laser lines at precisely defined optical frequencies simultaneously can enhance the capabilities of digital holography. This advancement, known as dual-comb holography, allows for novel optical diagnostics such as high spectral resolving power in three-dimensional imaging and precise dimensional metrology over large distances without interferometric phase ambiguity.
Article
Optics
Sidi-Ely Ahmedou, Romain Dauliat, Alexandre Parriaux, Alix Malfondet, Guy Millot, Laurent Labonte, Sebastien Tanzilli, Romain Dalidet, Jean-Christophe Delagnes, Philippe Roy, Raphael Jamier
Summary: We report on the conception, fabrication, and characterization of a new type of optical fiber that enables precise control of the ratio between the 2nd and 4th-order chromatic dispersion, which is crucial for Four-Wave-Mixing generation. The new design fiber allows for accurate control of chromatic dispersion properties while using a standard fabrication method, ensuring robustness against detrimental fluctuations during the process. Experimental frequency conversion with FWM in the new fiber design is demonstrated.
Article
Optics
Marco Piccardo, Vincent Ginis, Andrew Forbes, Simon Mahler, Asher A. Friesem, Nir Davidson, Haoran Ren, Ahmed H. Dorrah, Federico Capasso, Firehun T. Dullo, Balpreet S. Ahluwalia, Antonio Ambrosio, Sylvain Gigan, Nicolas Treps, Markus Hiekkamaki, Robert Fickler, Michael Kues, David Moss, Roberto Morandotti, Johann Riemensberger, Tobias J. Kippenberg, Jerome Faist, Giacomo Scalari, Nathalie Picque, Theodor W. Haensch, Giulio Cerullo, Cristian Manzoni, Luigi A. Lugiato, Massimo Brambilla, Lorenzo Columbo, Alessandra Gatti, Franco Prati, Abbas Shiri, Ayman F. Abouraddy, Andrea Alu, Emanuele Galiffi, J. B. Pendry, Paloma A. Huidobro
Summary: Our ability to manipulate light patterns by combining different electromagnetic modes has significantly improved in recent years. This concept of structured light is being applied across various fields of optics, enabling the generation of classical and quantum states of light, utilization of linear and nonlinear light-matter interactions, and advancements in microscopy, spectroscopy, holography, communication, and synchronization. This Roadmap provides an overview of these areas, their current research, and future developments, emphasizing the power of multimodal light manipulation to inspire new approaches in this vibrant research community.
Article
Chemistry, Analytical
Pei-Ling Luo, I-Yun Chen
Summary: In this study, a spectrometer based on synchronized two-color time-resolved dual-comb spectroscopy was developed for simultaneous spectral acquisitions in two molecular fingerprint regions. By using high-resolution rovibrational absorption spectroscopy, the concentration of target molecules can be quantitatively detected and simulated, enabling exploration of reaction mechanisms and pathways related to the formation of HOx radicals.
ANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Kilian Fritsch, Tobias Hofer, Jonathan Brons, Maksim Iandulskii, Ka Fai Mak, Zaijun Chen, Nathalie Picque, Oleg Pronin
Summary: The authors demonstrate a fully passive scheme of generating high-power dual-combs from a thin-disc gain medium. Compared to traditional dual-comb sources, this system achieves higher peak power and average power, addressing practical applications and frequency conversion challenges.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Amirhassan Shams-Ansari, Mengjie Yu, Zaijun Chen, Christian Reimer, Mian Zhang, Nathalie Picque, Marko Loncar
Summary: Laser frequency comb generators on photonic chips show the potential for integrated dual-comb microspectrometers. Among nanophotonic platforms, the low-loss thin-film lithium-niobate-on-insulator technology stands out with its ability to combine various optoelectronic and nonlinear optical functionalities. In this study, a critical step towards on-chip fabrication of a fully functional instrument is demonstrated with an electro-optic microring-based dual-comb interferometer. The system achieves spectra with a range of 1.6 THz and a resolution of 10 GHz in a single measurement without the need for frequency scanning or moving parts. The frequency agility of the system enables multiplexed sensing of non-adjacent spectral regions without compromising the signal-to-noise ratio. These findings highlight the promising potential of electro-optic-based nanophotonic technology for broad-spectral-bandwidth molecular sensing.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Nicolas Berti, Kilian Baudin, Adrien Fusaro, Guy Millot, Antonio Picozzi, Josselin Garnier
Summary: In this study, we address the problem of thermalization in a time-dependent disorder system described by the nonlinear Schrödinger equation with a random potential. The nonlinearity drives the particles to thermalize to the Rayleigh-Jeans distribution, while the structural disorder relaxes the system towards a homogeneous equilibrium distribution, inhibiting thermalization. By applying the wave turbulence theory, we derive a kinetic equation that takes into account the presence of strong disorder and reveals the interplay between disorder and nonlinearity. Surprisingly, we find that a nonequilibrium process of condensation and thermalization can occur when disorder effects dominate over nonlinear effects.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Pei-Ling Luo
Summary: The reaction of Criegee intermediates with nitric acid is important for the removal of Criegee intermediates and the oxidation of atmospheric nitric acid. The study shows that the product branching ratios of the reaction are pressure dependent, and the Criegee intermediate CH2OO can be catalytically converted to OH and HCO radicals by nitric acid. It is crucial to measure the formation of HOx radicals from this reaction to understand its atmospheric implications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Hao Yue, Cuihong Zhang, Xiaoxiao Lin, Zuoying Wen, Weijun Zhang, Sabah Mostafa, Pei-Ling Luo, Zihao Zhang, Patrick Hemberger, Christa Fittschen, Xiaofeng Tang
Summary: In this study, the self-reaction of ethyl peroxy radicals was comprehensively investigated using vacuum ultraviolet photoionization mass spectrometry and theoretical calculations. The dimeric product as well as other products formed from the self-reaction were observed and confirmed. The study provides a direct measurement of the elusive dimeric product ROOR and demonstrates its non-negligible branching ratio.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Physics, Multidisciplinary
Alexandre Parriaux, Kamal Hammani, Christophe Thomazo, Olivier Musset, Guy Millot
Summary: We demonstrate the use of dual-comb spectroscopy for isotope ratio measurements, showing that it can be extended to the mid-infrared using a difference frequency generator. The measurements performed show good repeatability and low uncertainty, with results compatible to those obtained by isotope ratio mass spectrometry.
PHYSICAL REVIEW RESEARCH
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Tobias Hofer, Kilian Fritsch, Nathalie Picque, Oleg Pronin
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Article
Chemistry, Physical
Wei-Che Liang, Pei-Ling Luo, Yuan-Pern Lee
Summary: Reactions between Criegee intermediates and hydrogen halides are significant in the polluted urban atmosphere, with observation and assignment of transient species such as chloromethyl hydroperoxide (CMHP). Secondary reactions leading to H2O and formyl chloride (CHClO) were also identified, along with the determination of rate coefficient for the reaction CH2OO + HCl using infrared quantum-cascade laser absorption system under specific conditions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
