Article
Optics
Shampy Mansha, Parikshit Moitra, Xuewu Xu, Tobias W. W. Mass, Rasna Maruthiyodan Veetil, Xinan Liang, Shi-Qiang Li, Ramon Paniagua-Dominguez, Arseniy I. Kuznetsov
Summary: This study presents a novel design of spatial light modulators (SLMs) that enable small pixel and multi-spectral operation. The design utilizes LC-tunable Fabry-Perot nanocavities to support multiple resonances across the visible range, allowing for high reflectance and continuous phase modulation. Experimental results demonstrate the device's programmable beam steering and lensing capabilities with high efficiency. This design opens up new possibilities for SLM applications in displays, optical computing, and beyond.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Akanksha Gautam, T. S. Athira, Dinesh N. Naik, Rajeev Singh, C. S. Narayanamurthy, Rakesh Kumar Singh
Summary: We introduce a method of recording incoherent vector holograms using a stable field-based interferometer and radial shearing technique. The vector holograms are recorded as elements of the 2x2 cross-spectral density (CSD) matrix, and the object encoded into these holograms is digitally reconstructed by propagating the elements of the CSD matrix. The CSD matrix, containing complex spatial coherence function elements, is connected to an incoherent vector source through the vectorial van Cittert-Zernike theorem. We experimentally measure the two-dimensional distributions of the complex elements of the CSD matrix using a Sagnac radial shearing interferometer with a phase-shifting approach.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Vipin Manisha, Vipin Tiwari, Nandan S. Bisht, Rakesh Kumar Singh
Summary: A compact and stable lensless digital holographic system is proposed for polarimetric analysis of SLM. The system employs a robust cyclic shearing interferometer and characterizes the polarimetric response of the SLM by extracting the complex fields of the orthogonal polarization components. The proposed technique is shown to be suitable even under external disturbances, making it beneficial for polarimetric imaging and stable holographic system design.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Leslie J. Cusato, Jorge R. Torga, Eneas N. Morel
Summary: The use of low-coherence interferometry in industrial applications is growing due to its non-destructive nature and high resolution. Fourier domain systems are preferred for their scanning-free method. A spatial heterodyne detector has proven useful for extending the measurement range without sacrificing micrometric resolution. However, image processing may be necessary to enhance the visualization and detection of fringes, especially for low light intensities.
OPTICS COMMUNICATIONS
(2023)
Article
Instruments & Instrumentation
Miles J. Egan, Arelis M. Colon, S. Michael Angel, Shiv K. Sharma
Summary: Spatial heterodyne spectrometers are known for their ability to acquire high-resolution emission spectra in compact designs, but their sensitivity is limited by multiplicative photon noise. This study introduces a novel coupling method with an Amici prism spectrometer to suppress multiplicative noise and enable the measurement of weak Raman spectral features that would have been washed out by traditional spatial heterodyne spectrometers.
APPLIED SPECTROSCOPY
(2021)
Article
Optics
Heshan Liu, Juan Wang, Ruihong Gao, Ziren Luo
Summary: CAM heterodyne interferometry is a new interferometry method that provides an optical pilot tone (OPT) for noise correction. Compared with analog pilot tones, OPT can record and correct more noises. The best choice for CAM-modulated parameter is modulated depth phi(modulate) = 1.375 rad and power ratio of the beam split n = 0.432. A simulated case has been implemented to verify the effectiveness of the CAM strategy.
Article
Chemistry, Analytical
Cheng-Chih Hsu, Wan-Yu Chung, Chun-Yi Chang, Chyan-Chyi Wu, Cheng-Ling Lee
Summary: In this study, a glucose fiber sensor incorporating heterodyne interferometry was developed to measure the phase difference caused by the chemical reaction between glucose and glucose oxidase (GOx). The results showed that the phase variation is inversely proportional to glucose concentration. The proposed method has a linear measurement range of glucose concentration from 10 mg/dL to 550 mg/dL and an optimum resolution better than 0.6 mg/dL.
Article
Optics
Di Chang, Ziqi Yin, Yunke Sun, Pengcheng Hu, Jiubin Tan, Zhigang Fan
Summary: In this study, a spatially separated heterodyne grating interferometer that measures in- and out-of-plane displacements is proposed. The experiment results show that the interferometer has high stability and accuracy, and has a large misalignment tolerance.
Article
Optics
O. Borovkova, S. Lutsenko, D. Sylgacheva, A. Kalish, V. Belotelov
Summary: We address the properties of the Faraday effect in a magnetoplasmonic nanostructure with nonuniform spatial distribution of magnetization for the first time. Our experiments demonstrate that the resonant enhancement of the Faraday effect is achieved through the coincidence in period and phase between magnetization modulation and the optical mode field. This effect is observed for both the surface plasmon polariton and waveguide modes.
Review
Chemistry, Analytical
Wen-li Zhang, Zhao-yu Liu, Heng Wang, Yu Chen, Yi Wang, Zhen-zhen Zhao, Tong Sun
Summary: Spatial heterodyne spectroscopy (SHS) is a new type of spectral detection technology with advantages such as high resolution and real-time detection, widely used in atmospheric, environmental, chemical fields, and has become a research hotspot.
MICROCHEMICAL JOURNAL
(2021)
Article
Optics
Yifan Li, Xiaotao Mi, Xiangdong Qi, Shanwen Zhang, Guojun Yang, Hongzhu Yu, Xiaotian Li, Wenhao Li
Summary: A method for tiling echelle gratings based on lateral shearing interferometry is proposed, with mosaic errors being calculated and corrected by observing adjacent orders. An experimental verification with two 50 mm x 50 mm, 79 grooves/mm echelles showed rms wavefront better than 0.04 wavelength, with angular and translation sensitivities achieved below 1 arcsec and 10 nm, respectively.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Shawn Mcsorley, David R. Gozzard, Skevos F. E. Karpathakis, Benjamin P. Dix-matthews, Sascha W. Schediwy
Summary: Free-space continuous-wave laser interferometry using folded links is widely used for precision measurement in various fields. However, the performance of these systems is affected by prompt reflections from the transceiver optics. In this study, we demonstrate a phase stabilized free-space continuous-wave optical frequency transfer method that effectively filters out prompt reflections using auto-correlation properties of pseudo-random binary sequences. The results show significant improvement in stability and robustness, achieving a best fractional frequency stability of 8 x 10-20 and cycle-slip-free periods up to 162 minutes over a turbulent free-space channel of 750 m.
Article
Optics
Zhen Kun Tan, Jiao Wang, Ying Xiu Kong, Si Chen Lei, Yao Li
Summary: This study derived the Degree of Polarization (DoP) of a partially Gaussian Schell-model (GSM) beam in a slant atmosphere turbulence using a mathematical model, and investigated its effects on the performance of a suggested detection system. The findings indicate that the inner scale of atmospheric turbulence significantly influences the DoP and heterodyne efficiency, and a higher heterodyne efficiency can be achieved by selecting appropriate parameters.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Optics
Nasim Mirzajani, Clare L. Keenan, Sarah R. Melton, Sarah B. King
Summary: This paper presents an interferometric design for a phase-sensitive electronic sum frequency generation (e-SFG) spectrometer in the time domain with lock-in detection. It achieves direct measurement of the phase between SFG and local oscillator fields through continuous phase modulation, and offers unprecedented stability by correcting errors in the path length difference caused by drifts in the optics.
Article
Spectroscopy
Qingsheng Xue, Nan Wang, Hui Yang, Jingyao Yang, Haoxuan Bai
Summary: In this study, a method combining Spatial heterodyne technology and Raman spectroscopy was proposed for rapid, efficient, and accurate detection of microplastics. By building a spatial heterodyne spectrometer and an optical system, detection and identification of different types of microplastic samples were achieved. The results showed a higher signal-to-noise ratio with this method, indicating its good performance and potential in the field of microplastics detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Optics
Ali Altaqui, Robert M. Kolbas, Michael J. Escuti, Brendan T. O'Connor, Michael W. Kudenov
Summary: The study focuses on using organic photodetectors for multispectral sensing, leveraging their unique capabilities and methods to design single-pixel multispectral detectors with high spectral selectivity and good radiometric performance. By exploring and optimizing two different architectures, a balance between spectral resolution and device fabrication flexibility is achieved.
Article
Agriculture, Multidisciplinary
Samiul Haque, Edgar Lobaton, Natalie Nelson, G. Craig Yencho, Kenneth Pecota, Russell Mierop, Michael W. Kudenov, Mike Boyette, Cranos M. Williams
Summary: The quality variation in horticultural crops significantly affects market value, but objectively characterizing subjective crop quality characteristics at production-scale remains challenging. Using sweetpotato as a case study, researchers introduced a high-throughput computer vision algorithm for quantifying shape and size characteristics, demonstrating the potential for industrial crop production big data analytics.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Multidisciplinary Sciences
Michael W. Kudenov, Clifton G. Scarboro, Ali Altaqui, Mike Boyette, G. Craig Yencho, Cranos M. Williams
Summary: This study applies visible and near-infrared interactance spectroscopy to detect internal necrosis in sweetpotatoes, demonstrating the unique optical signatures of necrotic tissues and representing a significant improvement over current destructive analysis methods.
Review
Optics
D. S. Doelman, F. Snik, E. H. Por, S. P. Bos, G. P. P. L. Otten, M. Kenworthy, S. Y. Haffert, M. Wilby, A. J. Bohn, B. J. Sutlieff, K. Miller, M. Ouellet, J. de Boer, C. U. Keller, M. J. Escuti, S. Shi, N. Z. Warriner, K. Hornburg, J. L. Birkby, J. Males, K. M. Morzinski, L. M. Close, J. Codona, J. Long, L. Schatz, J. Lumbres, A. Rodack, K. Van Gorkom, A. Hedglen, O. Guyon, J. Lozi, T. Groff, J. Chilcote, N. Jovanovic, S. Thibault, C. de Jonge, G. Allain, C. Vallee, D. Patel, O. Cote, C. Marois, P. Hinz, J. Stone, A. Skemer, Z. Briesemeister, A. Boehle, A. M. Glauser, W. Taylor, P. Baudoz, E. Huby, O. Absil, B. Carlomagno, C. Delacroix
Summary: The vector-apodizing phase plate (vAPP) coronagraph has evolved from concept to practical application over the past decade, providing high-contrast imaging on 8 m class telescopes. It has been installed in multiple instruments and can offer low-resolution spectra.
Article
Astronomy & Astrophysics
David S. Doelman, Joost P. Wardenier, Peter Tuthill, Michael P. Fitzgerald, Jim Lyke, Steph Sallum, Barnaby Norris, N. Zane Warriner, Christoph Keller, Michael J. Escuti, Frans Snik
Summary: Sparse aperture masking (SAM) is an interferometric technique capable of imaging beyond the diffraction limit of single telescopes. The holographic aperture mask (HAM) is a prototype technology designed to increase throughput of SAM and add low-resolution spectroscopic capabilities, providing new differential observables for studying interstellar matter.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Harry M. Schrickx, Pratik Sen, Ronald E. Booth, Ali Altaqui, Jacob Burleson, Jeromy J. Rech, Jin-Woo Lee, Melike Biliroglu, Kenan Gundogdu, Bumjoon J. Kim, Wei You, Michael W. Kudenov, Brendan T. O'Connor
Summary: Polymer semiconductors can achieve exceptional in-plane polymer alignment for polarization sensitive photodetectors, leveraging their thermomechanical properties. By utilizing high and low weight average molar mass polymer blends, films with high dichroic ratios and polarized photocurrent ratios were obtained, showcasing the potential for incorporation into novel device architectures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Ali Altaqui, Harry Schrickx, Pratik Sen, Lingshan Li, Jeromy Rech, Jin-Woo Lee, Nrup Balar, Wei You, Bumjoon J. Kim, Michael Escuti, Robert Kolbas, Brendan T. O'Connor, Michael Kudenov
Summary: The bio-inspired spectral and polarization sensor structure integrates P-OPVs and LCP retarders, enabling color tuning and polarization sensitivity. This structure allows for detecting spectral and polarimetric contents along the same optical axis, overcoming limitations associated with conventional division-of-focal plane sensors.
Article
Optics
Lingshan Li, Shuojia Shi, Jihwan Kim, Michael J. Escuti
Summary: The geometric-phase lens (GPL), identified as a compelling solution in AR/VR/MR headsets, offers a small form factor compared to traditional refractive lenses. This study proposes a design of color-selective GPLs based on liquid crystals, exhibiting high chromatic efficiency spectra and compact dimensions.
Article
Engineering, Aerospace
Anna Boehle, David Doelman, Bjorn S. Konrad, Frans Snik, Adrian M. Glauser, Emiel H. Por, Nathaniel Z. Warriner, Shuojia Shi, Michael J. Escuti, Matthew A. Kenworthy, Sascha P. Quanz
Summary: The laboratory characterization of the grating vector apodizing phase plate (gvAPP) coronagraph for the upcoming instrument ERIS at VLT has shown promising results in achieving high contrast levels. By improving the writing accuracy to 0.3 degrees, the gvAPP will not be the limiting factor in achieving high contrast imaging of exoplanets.
JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS
(2021)
Article
Engineering, Aerospace
Paul McKee, Hoang Nguyen, Michael W. Kudenov, John A. Christian
Summary: StarNAV is a method for inferring an observer's velocity by measuring changes in inter-star angles using starlight. This study explores the effectiveness of using wide field-of-view optical cameras for this purpose. Key algorithmic considerations for processing large star fields are discussed, and a feasible point design with proof-of-concept performance is developed.
Article
Optics
Michael W. Kudenov, Ali Altaqui, Cranos Williams
Summary: This paper presents a generalized procedure for multispectral sensing using a pixelated polarization camera and anisotropic polymer film retarders to create multivariate optical filters. The calibration procedure is described, and experimental results demonstrate the feasibility of obtaining multiple spectral channels with a relatively simple and robust optical setup.
Article
Optics
Ali Altaqui, Harry Schrickx, Sydney Gyurek, Pratik Sen, Michael Escuti, Brendan T. O'Connor, Michael Kudenov
Summary: This paper presents a multispectral organic sensor based on geometric phase lenses and organic photovoltaics. The sensor mimics the color sensing technique used by animals and achieves multi-color detection. Experimental results demonstrate the sensor's advantages of simple design and high resolution.
OPTICAL ENGINEERING
(2022)
Article
Optics
Clifton G. Scarboro, Colleen J. Doherty, Peter J. Balint-Kurti, Michael W. Kudenov
Summary: Bidirectionality effects can be a significant confounding factor in measuring hyperspectral reflectance data. This paper presents a system for collecting mmBRDF measurements using static optical fiber detectors, which allows for simultaneous acquisition of Stokes vector intensity components at multiple altitudinal and azimuthal viewing positions.
Proceedings Paper
Remote Sensing
Joshua C. Larsen, Robert Austin, Jeffrey Dunne, Michael W. Kudenov
Summary: This paper discusses the preliminary results of using polarization imaging to quantify defoliation in peanut plants in response to leaf spot disease, and the advantages of polarization imaging compared to conventional visual scoring. The paper also introduces the details of the experimental trials.
POLARIZATION: MEASUREMENT, ANALYSIS, AND REMOTE SENSING XV
(2022)
