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An Optical Interferometer for Parallel Modulo Operation

Kouichi NITTA, Nobuto KATSUTA, Osamu MATOBA
2008 The Review of Laser Engineering  
An optical processor for modulo operations is estimated. Large scale information processing for modulo operations is effective in an algorithm in prime factorization.  ...  One of the features of the processor is that it achieves parallel data processing for modulo multiplication with only simple operation.  ...  Parallel modulo operations in an algorithm for prime factorization Prime factorization is a process to extract prime factors from a target positive integer N.  ... 
doi:10.2184/lsj.36.1327 fatcat:nvf4xl4h3fcv5pguikyfyjj434

Near-perfect measuring of full-field transverse-spatial modes of light [article]

Markus Hiekkamäki, Shashi Prabhakar, Robert Fickler
2019 arXiv   pre-print
Along with the growing interest in using the transverse-spatial modes of light in quantum and classical optics applications, developing an accurate and efficient measurement method has gained importance  ...  We experimentally test the technique using a single spatial light modulator and achieve an average error of 4.2% for a set of 9 different full-field Laguerre-Gauss and Hermite-Gauss modes with an efficiency  ...  Note that for the mode generation we also use an amplitude masking scheme [28] and overlay all phase structures with additional gratings in the experiment (not shown).  ... 
arXiv:1909.01685v1 fatcat:qig7pxtypncidcdcm2nnhvnpsu

Antenna Beamforming Using Optical Processing

L P. Anderson, F Boldissar, D.C. D. Chang, Kul B. Bhasin, Brian M. Hendrickson
1988 Optoelectronic Signal Processing for Phased-Array Antennas  
Random fluctuations in the amplitude and phase of the transform distribution at the antenna aperture could be attributable to several factors in the process of transmission to and downconversion  ...  Since parallel processing of both spatial and temporal aspects of the resultant antenna beam occurs in the network, the detected power at the output can be expressed as the sum of the individual paths"  ... 
doi:10.1117/12.944200 fatcat:wzafqhetzna47fzzrrofehpnue

Surface-plasmon spatial light modulators based on liquid crystal

Martin E. Caldwell, Eric M. Yeatman
1992 Applied Optics  
An optically addressed SLM that is based on a nematic liquid crystal with a spatial resolution better than 10 line pairs/mm (at 50% modulation transfer function) is demonstrated.  ...  Such modes offer controllable sensitivity-spatial resolution characteristics in simple liquid-crystal SLM structures.  ...  We thank the Science and Engineering Research Council for financial support of this work, the GEC-Marconi Research Centre for kindly providing the amorphous Si backplanes for our optically addressed SLM's  ... 
doi:10.1364/ao.31.003880 pmid:20725364 fatcat:rj3b6frdcbbktfex63ytswludi

Adiabatic evolution on a spatial-photonic Ising machine [article]

D. Pierangeli, G. Marcucci, C. Conti
2020 arXiv   pre-print
Here, we realize the adiabatic evolution of frustrated Ising models with 100 spins programmed by spatial light modulation.  ...  Our results demonstrate a photonic scheme for combinatorial optimization in analogy with adiabatic quantum algorithms and enforced by optical vector-matrix multiplications and scalable photonic technology  ...  Optical Ising machines use multiple frequency or spa-tial channels to process data at high speed and in parallel.  ... 
arXiv:2005.08690v1 fatcat:iepjyposnfdrfdazvhuvyjzfma

Seventh-order wavefront modulation with a gravity-neutral optofluidic deformable phase plate

Pouya Rajaeipour, Martin Sauther, Kaustubh Banerjee, Hans Zappe, Çağlar Ataman
2021 Journal of Optical Microsystems  
A 63-electrode optofluidic refractive wavefront modulator enabling spatial frequency correction up to the seventh radial Zernike order, the highest spatial order ever achieved with a refractive dynamic  ...  typical for optofluidic devices.  ...  Acknowledgments This project has received funding from the German Federal Ministry for Economic Affairs and Energy (BMWi) and the European Social Fund (ESF) (Project DPAO, Grant No. 03EFOBW211).  ... 
doi:10.1117/1.jom.1.3.034502 fatcat:bryldjy4o5g67ayhjt7nl5mcoa

Motion compensation in structured illumination fluorescence endomicroscopy

Andrew Thrapp, Michael R. Hughes, Melissa J. Suter, Guillermo J. Tearney, Thomas D. Wang
2019 Endoscopic Microscopy XIV  
This offers potential for low cost, versatile, optically-sectioned endomicroscopy.  ...  Endomicroscopy is a technique for obtaining real-time images in vivo, eliminating the need to biopsy a tissue sample.  ...  ACKNOWLEDGMENTS This work was partially support by EPSRC Grant EP/R019274/1, Ultrathin Fluorescence Microscope in a Needle.  ... 
doi:10.1117/12.2509590 fatcat:7zjuwijlwvbrfjuijfq43r22aq

Structured light for ultrafast laser micro- and nanoprocessing

Daniel Flamm, Daniel G. Grossmann, Marc Sailer, Myriam Kaiser, Felix Zimmermann, Keyou Chen, Michael Jenne, Jonas Kleiner, Julian Hellstern, Christoph Tillkorn, Dirk H. Sutter, Malte Kumkar
2021 Optical Engineering: The Journal of SPIE  
In the beam shaping concepts presented, special attention was paid to suitability for both high energies and high powers.  ...  Recently, the combination of these remarkable temporal pulse properties with advanced structured light concepts has led to breakthroughs in the development of laser application methods, which will now  ...  In this configuration, the SLM's left-hand side in combination with QWP and TFP acts as amplitude modulator and imprints and amplitude mask to the illuminating field.  ... 
doi:10.1117/1.oe.60.2.025105 fatcat:gtsghuayjfg6blwsyh27tyscay

Number–Space Interactions in the Human Parietal Cortex: Enlightening the SNARC Effect with Functional Near-Infrared Spectroscopy

Simone Cutini, Fabio Scarpa, Pietro Scatturin, Roberto Dell'Acqua, Marco Zorzi
2012 Cerebral Cortex  
Moreover, the involvement of left ANG is consistent with the mediating role of verbal/cultural factors in shaping interactions between numbers and space.  ...  gyrus (ANG), a region implicated in verbal number processing.  ...  The last 2 columns show the z scores for the SNARC effect (amplitude modulation) and the distance effect (peak latency modulation).  ... 
doi:10.1093/cercor/bhs321 pmid:23081883 fatcat:gyku73faujbhfm2maqx5fjm25e

Page 2532 of Psychological Abstracts Vol. 86, Issue 7 [page]

1999 Psychological Abstracts  
frequency range by modulating the saccadic behavior as to increase the amplitude of ocular tor sion.  ...  The results suggest that reading patterns should be considered as a potential confounding factor in spatially directed attention as measured by cancellation performance 19726.  ... 

Autonomous Repeat Image Feature Tracking (autoRIFT) and Its Application for Tracking Ice Displacement

Yang Lei, Alex Gardner, Piyush Agram
2021 Remote Sensing  
In this paper, we build on past efforts with regard to the implementation of an efficient feature tracking algorithm for the mass processing of satellite images.  ...  When applied to satellite imagery, autoRIFT can run on a grid in the native image coordinates (such as radar or map) and, when used in conjunction with the Geogrid module, on a user-defined grid in geographic  ...  The core processing in autoRIFT (i.e., NCC and image pre-processing) calls OpenCV's Python and C++ functions and has been parallelized with the capability of multithreading for further efficiency.  ... 
doi:10.3390/rs13040749 fatcat:5c65x7jtqnbctbduginlpndgzm

Optical framed knots as information carriers

Hugo Larocque, Alessio D'Errico, Manuel F. Ferrer-Garcia, Avishy Carmi, Eliahu Cohen, Ebrahim Karimi
2020 Nature Communications  
We further develop a protocol in which the topological properties of framed knots are used in conjunction with prime factorization to encode information.  ...  Hence, structured light with topological properties could potentially be used for such purposes.  ...  In the interferometer, the two polarized components are individually modulated by a spatial light modulator (SLM) and then coherently recombined to form an optical-framed knot.  ... 
doi:10.1038/s41467-020-18792-z pmid:33037210 fatcat:qyygy5jadngjdio4gp7ovvvpqu

Measurement of density fluctuations using digital holographic interferometry in a standing wave thermoacoustic oscillator

Guillaume Penelet, Mathieu Leclercq, Thibault Wassereau, Pascal Picart
2016 Experimental Thermal and Fluid Science  
This paper describes an optical set-up for measuring density fluctuations associated to acoustic oscillations in a thermoacoustic prime-mover.  ...  of wave amplitude growth.  ...  The spatial resolution is related to 1/∆u and 1/∆v respectively in 171 the x-y axis. In addition the phase recovered with Eq. (4) includes the spatial 172 carrier modulation that has to be removed.  ... 
doi:10.1016/j.expthermflusci.2015.09.012 fatcat:2d4yfkkoqnbptkok57lqd553qa

Optical Fourier processor and point-diffraction interferometer for moving-object trajectory estimation

Pierre M. Lane, Michael Cada
1999 Applied Optics  
A hybrid optical-digital signal processing system that estimates the trajectory of moving targets in a two-dimensional field at video frame rates was developed and constructed.  ...  conventional electronic processing techniques.  ...  In this paper we describe a hybrid optical-digital signal processor that exploits and combines the parallel-processing capabilities of optical signal processing and the accuracy of digital signal processing  ... 
doi:10.1364/ao.38.004306 pmid:18323916 fatcat:ibdwxi6xbfbkvp3otvmixicybq

The Photodetector Array Camera and Spectrometer (PACS) on the HerschelSpace Observatory

A. Poglitsch, C. Waelkens, N. Geis, H. Feuchtgruber, B. Vandenbussche, L. Rodriguez, O. Krause, E. Renotte, C. van Hoof, P. Saraceno, J. Cepa, F. Kerschbaum (+71 others)
2010 Astronomy and Astrophysics  
In photometry mode, it simultaneously images two bands, 60-85\mu\ m or 85-125\mu\m and 125-210\mu\ m, over a field of view of ~1.75'x3.5', with close to Nyquist beam sampling in each band.  ...  In spectroscopy mode, it images a field of 47"x47", resolved into 5x5 pixels, with an instantaneous spectral coverage of ~1500km/s and a spectral resolution of ~175km/s.  ...  Marliani's (ESTEC) support in fighting a crucial battle shall never be forgotten.  ... 
doi:10.1051/0004-6361/201014535 fatcat:sm5aztpvebe25amkln477dylju
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