Article
Chemistry, Multidisciplinary
Lu Yu, Hongbo Li, Jing Li, Wei Li
Summary: The large-aperture static imaging spectrometer (LASIS) is an interference spectrometer that offers high device stability, high throughput, a wide spectral range, and a high spectral resolution. In order to compress the data acquired by LASIS, a lossless compression scheme is proposed that combines a novel data rearrange method and the lossless multispectral and hyperspectral image compression standard CCSDS-123. The experimental results demonstrate that the proposed scheme outperforms traditional methods and provides a higher compression ratio while maintaining the quality of the data.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
A. A. Afanas'ev, V. M. Volkov, Yu A. Kurochkin, D. Novitsky
Summary: The theory of transportation and localization of a transparent dielectric spherical particle in a laser field is developed in this study, showing that the amplitude of gradient force components depends on the ratio of particle radius to modulation periods. Critical particle radii are determined by Bessel functions zeros, and the results can be utilized for studying the dynamics of optical assembly of particle matrix.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Tian-Wei Wang, Xian-Zi Dong, Feng Jin, Yuan-Yuan Zhao, Xiang-Yang Liu, Mei-Ling Zheng, Xuan-Ming Duan
Summary: This study investigates the precise modulation of gap width in maskless lithography using a digital micromirror device (DMD). The relationship between structure morphology and light intensity distribution is analyzed, and the gap width is optimized by modulating exposure energy. The aperture diameter of the objective lens is found to have a substantial effect on pattern consistency. The study also proposes an alternative method for achieving fine gap structures through structural decomposition design and precise control of exposure energy. This research provides a promising protocol for fabricating controllable gap microstructures using maskless lithography.
Article
Engineering, Multidisciplinary
Bin Sun, Gang Zheng, Xiongxing Zhang
Summary: The technology of frequency modulated continuous wave (FMCW) laser interferometer originates from optical interferometry technology, offering higher precision and larger range with less traditional interferometer devices. By utilizing laser interference technology and combining it with contact sensors, an innovative contact type long-range displacement sensor based on FMCW is proposed, allowing direct measurement of workpieces with complex surface conditions on the production line and expanding the application of optical fiber interferometry.
Article
Engineering, Electrical & Electronic
Fan Zhang, Bin Li, Xiaoyu Chen, Yuanhongliu Gao, Xin Yan, Xuenan Zhang, Fang Wang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng
Summary: A Sagnac interferometer-based magnetic field sensor is proposed and demonstrated, utilizing the high birefringence of an asymmetric four-hole fiber (AFHF) and the sensitivity of magnetic fluid (MF) to magnetic field. The sensor has a high sensitivity, good repeatability, stability, and is insensitive to ambient temperature disturbance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Lipeng Wan, Tianbao Yu, Daomu Zhao, Wolfgang Loffler
Summary: By using a conventional arrayed image sensor and 2D Fourier analysis, it is possible to resolve sub-micrometer periodic patterns with a resolution far beyond the Nyquist limit set by the pixel size. This method also enables wavelength sensing with high resolving power.
LASER & PHOTONICS REVIEWS
(2023)
Review
Optics
A. Camarillo-Aviles, M. V. Hernandez-Arriaga, R. Lopez-Estopier, M. Bello-Jimenez, O. Pottiez, M. Duran-Sanchez, B. Ibarra-Escamilla, M. V. Andres
Summary: This study reports switchable multi-wavelength laser emission from a thulium-doped all-fiber laser by implementing tapered and non-tapered multi-modal interference (MMI) filters. The tapered MMI structure achieves lower insertion loss and more wavelength emission options in the 2μm region.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Mengmeng Li, Hongchao Zhang, Jian Lu, Zhong-Hua Shen
Summary: A novel method has been developed to detect closed cracks in transparent samples by opening the crack with laser ultrasonic shear waves and making the cracks visible in interferogram images. The width of the opened crack can also be quantitatively estimated.
Article
Physics, Multidisciplinary
Jiaqi Hu, Zhaorong Wang, Seonghoon Kim, Hui Deng, Sebastian Brodbeck, Christian Schneider, Sven Hofling, Nai H. Kwong, Rolf Binder
Summary: By using a microcavity with strong polarization selectivity, researchers observed a fermionic gain mechanism underlying polariton laser, which is consistent with an open-dissipative-pumped system analog of a polaritonic BCS state.
Article
Engineering, Electrical & Electronic
Shimeng Chen, Yun Liu, Qingxu Yu, Wei Peng
Summary: This article demonstrates a novel interference behavior excited by visible light in a capillary waveguide (CWG) and systematically investigates the sensing principle and optical characteristics of CWG. The proposed sensor shows sharp interference fringes and tunable temperature sensitivity, with the potential to be used as an optical interferometer with lower cost and wider dynamic range.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Ruixin Zhao, Chaoyue Chen, Sansan Shuai, Tao Hu, Yves Fautrelle, Hanlin Liao, Jian Lu, Jiang Wang, Zhongming Ren
Summary: This study successfully achieved refined grain structure and improved mechanical properties in metallic additive manufacturing through a novel magnetic-field regulation method, providing a new approach for Ti6Al4V alloy fabrication. The magnetic field effectively improved the microstructure of the alloy.
MATERIALS RESEARCH LETTERS
(2022)
Article
Optics
Qusay M. A. Hassan, H. A. Sultan, Hussein F. Hussein, C. A. Emshary
Summary: The objective of this study is to find a material with high nonlinear optical properties and test its optical limiting and all-optical switching properties. The nonlinear refractive index of the material is determined using two techniques, and theoretical calculations are performed on the far-field diffraction patterns.
Article
Optics
Lian Yu, Yu Yang, Bin Liu, Pinghua Tang, Haining Ji, Jingting Wang, Tianqi Tan
Summary: This paper proposes an acoustic emission (AE) detection sensor that combines optical fiber sensing with laser self-mixing interference (SMI) technology. It can detect failures in materials and structures at an early stage. Through finite element analysis and experimental verification, the proposed system has been shown to have advantages such as resistance to interference, simple structure, and high measurement accuracy and sensitivity.
Article
Engineering, Electrical & Electronic
Yaxiong He, Yong Zhang, Chuan Ke, Qifan Wen, Shu Liu, Dongye Zhao, Min Xu, Tao Xu, Yong Zhao
Summary: A compact optical scanning LIBS analysis system was developed using a deflection mirror design to achieve rapid scanning and precise analysis. The calibration model was established and validated, demonstrating high accuracy.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Jialiang Zhang, Guanjun Gao, Bolun Wang, Xiaolei Guan, Longfei Yin, Jingbiao Chen, Bin Luo
Summary: This paper presents experimental demonstrations of broadband background noise resistant air-water and underwater wireless optical communication. The results show that the use of specific laser and filter can improve system performance and extend the depth of the receiver under solar noise interference. The findings highlight the importance of broadband background noise resistance for underwater optical communication systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Katarina Rebrosova, Silvie Bernatova, Martin Siler, Magdalena Uhlirova, Ota Samek, Jan Jezek, Veronika Hola, Filip Ruzicka, Pavel Zemanek
Summary: Urinary tract infections are among the most common infections worldwide. This study demonstrates that Raman spectroscopy can be used as a rapid diagnostic tool to differentiate causative agents and determine antimicrobial susceptibility. It holds great potential for clinical diagnostics in the future.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
Ianina L. Violi, Luciana P. Martinez, Mariano Barella, Cecilia Zaza, Lukas Chvatal, Pavel Zemanek, Marina V. Gutierrez, Maria Y. Paredes, Alberto F. Scarpettini, Jorge Olmos-Trigo, Valeria R. Pais, Ivan Diaz Noblega, Emiliano Cortes, Juan Jose Saenz, Andrea V. Bragas, Julian Gargiulo, Fernando D. Stefani
Summary: This article reviews the state of the art of optical printing of single nanoparticles and discusses its strengths, limitations, and future perspectives by focusing on four main challenges: printing accuracy, resolution, selectivity, and nanoparticle photostability.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Biochemical Research Methods
Tomas Pikalek, Miroslav Stiburek, Stephen Simpson, Tomas Cizmar, Johanna Tragardh
Summary: Multimode fibres have potential as miniature endoscopes for deep tissue imaging. Using a composite probe consisting of a GRIN fibre and a spliced on step-index fibre reduces the intensity of the non-linear background signal.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Optics
Petr Jakl, Martin Siler, Jan Jezek, Angel Cifuentes, Johanna Tragardh, Pavel Zemanek, Tomas Cizmar
Summary: This paper demonstrates that combining a relatively small number of transmission matrices (TMs), measured using different internal references, can completely eliminate blind spots in multimode fiber-based endoscopic imaging, resulting in a significant enhancement of imaging quality.
Article
Optics
Andre D. Gomes, Sergey Turtaev, Yang Du, Tomas Cizmar
Summary: Holographic, multimode fibre-based endoscopes offer high-quality in-vivo imaging and have promising applications. Researchers have achieved diffraction-limited foci with high purity and sharpness, representing the highest reported optical power delivery. The study also examines the impact of various experimental conditions on imaging performance.
Article
Neurosciences
Ahmed S. Abdelfattah, Sapna Ahuja, Taner Akkin, Srinivasa Rao Allu, Joshua Brake, David A. Boas, Erin M. Buckley, Robert E. Campbell, Anderson Chen, Xiaojun Cheng, Tomas Cizmar, Irene Costantini, Massimo De Vittorio, Anna Devor, Patrick R. Doran, Mirna El Khatib, Valentina Emiliani, Natalie Fomin-Thunemann, Yeshaiahu Fainman, Tomas Fernandez-Alfonso, Christopher G. L. Ferri, Ariel Gilad, Xue Han, Andrew Harris, Elizabeth M. C. Hillman, Ute Hochgeschwender, Matthew G. Holt, Na Ji, Kivilcim Kilic, Evelyn M. R. Lake, Lei Li, Tianqi Li, Philipp Machler, Evan W. Miller, Rickson C. Mesquita, K. M. Naga Srinivas Nadella, U. Valentin Nagerl, Yusuke Nasu, Axel Nimmerjahn, Petra Ondrackova, Francesco S. Pavone, Citlali Perez Campos, Darcy S. Peterka, Filippo Pisano, Ferruccio Pisanello, Francesca Puppo, Bernardo L. Sabatini, Sanaz Sadegh, Sava Sakadzic, Shy Shoham, Sanaya N. Shroff, R. Angus Silver, Ruth R. Sims, Spencer L. Smith, Vivek J. Srinivasan, Martin Thunemann, Lei Tian, Lin Tian, Thomas Troxler, Antoine Valera, Alipasha Vaziri, Sergei A. Vinogradov, Flavia Vitale, Lihong Wang, Hana Uhlirova, Chris Xu, Changhuei Yang, Mu-Han Yang, Gary Yellen, Ofer Yizhar, Yongxin Zhao
Summary: This article reviews a diverse toolkit of novel methods for exploring brain function that have emerged from the BRAIN Initiative and related large-scale efforts, with a focus on neurophotonic tools applicable to animal studies. It provides an outlook for future directions in the field.
Article
Chemistry, Analytical
Anton Karalko, Peter Kesa, Frantisek Jelinek, Ludek Sefc, Jan Jezek, Pavel Zemanek, Tomas Grus
Summary: The study aims to develop a method to inject CO2 foam that reduces the risk of brain tissue embolism and heart infarction. Compared to iodine contrast agents, CO2 foam has lower complication risks, and the non-linear contrast imaging method can effectively image micron-sized gas microbubbles in the heart.
Article
Optics
Sylvain Gigan, Ori Katz, Hilton B. de Aguiar, Esben Ravn Andresen, Alexandre Aubry, Jacopo Bertolotti, Emmanuel Bossy, Dorian Bouchet, Joshua Brake, Sophie Brasselet, Yaron Bromberg, Hui Cao, Thomas Chaigne, Zhongtao Cheng, Wonshik Choi, Tomas Cizmar, Meng Cui, Vincent R. Curtis, Hugo Defienne, Matthias Hofer, Ryoichi Horisaki, Roarke Horstmeyer, Na Ji, Aaron K. LaViolette, Jerome Mertz, Christophe Moser, Allard P. Mosk, Nicolas C. Pegard, Rafael Piestun, Sebastien Popoff, David B. Phillips, Demetri Psaltis, Babak Rahmani, Herve Rigneault, Stefan Rotter, Lei Tian, Ivo M. Vellekoop, Laura Waller, Lihong Wang, Timothy Weber, Sheng Xiao, Chris Xu, Alexey Yamilov, Changhuei Yang, Hasan Yilmaz
Summary: In the last decade, various tools such as wavefront shaping and computational methods have been developed to understand and control the propagation of light in complex mediums. This field has revolutionized the possibility of diffraction-limited imaging at depth in tissues, and a vibrant community is actively working on it.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Multidisciplinary Sciences
Miroslav Stiburek, Petra Ondrackova, Tereza Tuckova, Sergey Turtaev, Martin Siler, Tomas Pikalek, Petr Jakl, Andre Gomes, Jana Krejci, Petra Kolbabkova, Hana Uhlirova, Tomas Cizmar
Summary: Controlled light transport through multimode fibres is a less traumatic approach to study deep brain structures using in-vivo imaging. The authors present a hair-thin endoscope that enables detailed view of the whole depth of the living animal brain. The instrument allows for multi-wavelength detection and random access options, with high lateral resolution. It can be used for observing neurons, their processes, blood vessels, calcium signaling, and blood flow velocity in individual vessels.
NATURE COMMUNICATIONS
(2023)
Review
Optics
Hui Cao, Tomas Cizmar, Sergey Turtaev, Tomas Tyc, Stefan Rotter
Summary: Light transport in a highly multimode fiber is complex and can be controlled using spatial wavefront shaping techniques. These techniques enable precise characterization of field propagation and tailor the transmitted light's spatial pattern, temporal profile, and polarization state. Multimode fibers find applications in imaging, endoscopy, optical trapping, and microfabrication. The output speckle pattern from a multimode fiber encodes information about the input light, allowing it to be retrieved from spatial measurements only. This article provides an overview of recent advances and breakthroughs in controlling light propagation in multimode fibers and discusses emerging applications.
ADVANCES IN OPTICS AND PHOTONICS
(2023)
Proceedings Paper
Engineering, Biomedical
David B. Phillips, Shuhui Li, Une G. Butaite, Hlib Kupianskyi, Simon A. R. Horsley, Tomas Cizmar
Summary: Hair-thin strands of multimode optical fibre (MMF) can be used as endoscopes to capture subcellular resolution images from deep inside the body. However, the images transmitted through MMFs are distorted and unrecognizable. This study presents two new methods to recover the images by calibrating the fibre's input end and designing an optical inverter to unscramble all modes simultaneously.
ADAPTIVE OPTICS AND WAVEFRONT CONTROL FOR BIOLOGICAL SYSTEMS IX
(2023)
Proceedings Paper
Optics
Miroslav Stiburek, Petr Jakl, Tomas Pikalek, Petra Ondrackova, Tomas Cizmar
Summary: Multiphoton microscopy allows tissue imaging with sub-cellular resolution at depths up to 1.5 mm. Optical relay elements called endoscopes are used to deliver light beyond this range. Minimally invasive endoscopy is achieved by focusing light through a step-index multimode optical fibre (MMF) using wave-front control. Fibre micro-endoscopes enable reaching any depth with minimal tissue disruption and maintaining resolution below 1 micron for in vivo microscopy. This study focuses on the impact of manufacturing methods on imaging quality of a custom-terminated multimode fibre probe.
22ND POLISH-SLOVAK-CZECH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS OF CONTEMPORARY OPTICS
(2022)
Proceedings Paper
Instruments & Instrumentation
Daan Stellinga, David B. Phillips, Simon Peter Mekhail, Adam Selyem, Sergey Turtaev, Tomas Cizmar, Miles J. Padgett
Summary: Endoscopes and similar instruments use bundles of optical fibers to relay each pixel of an image. However, modal dispersion can scramble the image. By treating the fiber as a complex aberration and applying corrective beam shaping, an image can be relayed along the fiber length. By beam-shaping a pulsed laser, a scanning spot can be produced at the distil end of the fiber, and 3D imaging can be achieved by measuring the time dependent intensity of the back-scattered light.
OPTICAL AND QUANTUM SENSING AND PRECISION METROLOGY II
(2022)
