108 Hits in 6.6 sec

Multimode nonlinear fiber optics, a spatiotemporal avenue

Katarzyna Krupa, Alessandro Tonello, Alain Barthélémy, Tigran Mansuryan, Vincent Couderc, Guy Millot, Philippe Grelu, Daniele Modotto, Sergey A. Babin, Stefan Wabnitz
2019 APL Photonics  
the few-mode fiber laser.  ...  The research interest in SDM techniques has led to the development of few-mode fibers for optical communication transmissions.  ... 
doi:10.1063/1.5119434 fatcat:35o4czjhqngp5kzkry62yiuc2e

Roadmap on optical sensors

Mário F S Ferreira, Enrique Castro-Camus, David J Ottaway, José Miguel López-Higuera, Xian Feng, Wei Jin, Yoonchan Jeong, Nathalie Picqué, Limin Tong, Björn M Reinhard, Paul M Pellegrino, Alexis Méndez (+3 others)
2017 Journal of Optics  
Linear (Rayleigh) and Ferreira et al.  ...  The possibility of multiplexing sensors in a given fiber (enabling OFS networks and reducing the cost-per-measurement-point) was demonstrated by 1986.  ...  Acknowledgments: We thank Steve Maddern, Andre Luiten, Heike Ebendorff-Heidepriem and Ori Henderson-Sapir for useful discussions.  ... 
doi:10.1088/2040-8986/aa7419 pmid:29375751 pmcid:PMC5781231 fatcat:a52iumt3uvfrfaqquzfwxwofhe

Light fields in complex media: Mesoscopic scattering meets wave control

Stefan Rotter, Sylvain Gigan
2017 Reviews of Modern Physics  
The driving force behind these advances has been the experimental accessibility of the information stored in the scattering matrix of a disordered medium, which can nowadays routinely be exploited to focus  ...  In particular, we will highlight the intimate connections between quantum transport phenomena and the scattering of light fields in disordered media, which can both be described by the same theoretical  ...  ACKNOWLEDGMENTS The authors would like to thank all members of the community that were kind enough to share the rights to reprint their figures and the following colleagues for very fruitful discussions  ... 
doi:10.1103/revmodphys.89.015005 fatcat:u4gr4wdtmrdfri42tloxq2qtrm

1976 IEEE Ultrasonics Symposium Abstracts

1977 IEEE Transactions on Sonics and Ultrasonics  
The fourth part will outline a few of the specific needs and opportunities as they apply to electron devices and especially acoustic devices.  ...  Electron devices are the basis for all electronic systems. The talk will be in four parts. The first part will provide some insight into the DoD planning process and what is going on today.  ...  Bound Rayleigh waves, existing outside of this spectrum, are significantly dispersive below the leaky-wave spectrum but only weakly dispersive above it.  ... 
doi:10.1109/t-su.1977.30922 fatcat:cjr5dktrszbmtdtfwco7f2tmvy

Optical coherence tomography today: speed, contrast, and multimodality

Wolfgang Drexler, Mengyang Liu, Abhishek Kumar, Tschackad Kamali, Angelika Unterhuber, Rainer A. Leitgeb
2014 Journal of Biomedical Optics  
Finally, various multimodal imaging modalities with OCT incorporated are reviewed, in that these multimodal implementations can synergistically compensate for the fundamental limitations of OCT when it  ...  Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.  ...  201880), Macular Vision Research Foundation, Austrian Science Fund (FWF) project number S10510-N20, and the Christian Doppler Society (Christian Doppler Laboratory "Laser development and their application in  ... 
doi:10.1117/1.jbo.19.7.071412 pmid:25079820 fatcat:m7o5q2xmyvehphenmcr5ge5s6y

High-efficiency receiver architecture for resonance-fluorescence and Doppler lidars

John A. Smith, Xinzhao Chu
2015 Applied Optics  
capability for the first time.  ...  In addition, the higher spatial and temporal resolutions afforded by high signal-to-noise ratio, down to resolutions of ∼20 s and ∼20 m, promise to make the first direct measurements of eddy flux in the  ...  We sincerely acknowledge Weichun Fong and Wentao Huang for their contributions to the development and operation of STAR Na Doppler lidar at the Table Mountain Lidar Observatory in Boulder and their assistance  ... 
doi:10.1364/ao.54.003173 pmid:25967301 fatcat:zky5ay75zzawdlf53ue6wrfqji

Modern optical astronomy: technology and impact of interferometry

Swapan K. Saha
2002 Reviews of Modern Physics  
Emphasis is placed on the problems specific to delay-lines, beam recombination, polarization, dispersion, fringe-tracking, bootstrapping, coherencing and cophasing, and recovery of the visibility functions  ...  The present 'state of the art' and the path to future progress in high spatial resolution imaging interferometry is reviewed.  ...  Wittkowski for providing the images, figures etc., and granting permission for their reproduction, as well as to H. Bradt and P. Hickson for reading the manuscript. The services rendered by V.  ... 
doi:10.1103/revmodphys.74.551 fatcat:zx7pqncxxndxrngybsrewlfjgi

Performance of optimized sound field control techniques in simulated and real acoustic environments

Philip Coleman, Martin Møller, Martin Olsen, Marek Olik, Philip Jackson, Jan Abildgaard Pedersen
2012 Journal of the Acoustical Society of America  
Spectral level measurements of individual and combined sounds are also documented in each NICU.  ...  Overall level vs. time measurements made over a one week time period in each NICU were compared with WHO guidelines.  ...  The array invariant in its original form is not exact invariant, but depends (weakly) on mode number and frequency.  ... 
doi:10.1121/1.4709059 fatcat:5yv7djzdifgwvlzymric4u65oa

A design methodology for 2D sparse NDE arrays using an efficient implementation of refracted-ray TFM

Jerzy Dziewierz, Timothy Lardner, Anthony Gachagan
2013 2013 IEEE International Ultrasonics Symposium (IUS)  
Recent advances in the field of tissue engineering include the engineering of skin, cartilage, and bladder, all of which are relatively thin tissues that can rely on diffusion for the delivery of oxygen  ...  These changes in collagen microstructure were produced using both ultrasound standing wave fields and traveling wave fields.  ...  The authors acknowledge the ANR and DGA for their support under the project Metactif, grant ANR-11-ASTR-015.  ... 
doi:10.1109/ultsym.2013.0035 fatcat:th5znfh7y5bklfdbmhb4u6iq2i

Comparison of procedures for determination of acoustic nonlinearity of some inhomogeneous materials

L. Bjørnø
1983 Journal of the Acoustical Society of America  
The temperature excursions measured by the reciprocity method fell between the upper and lower limits which, for lower modes, were separated by only a few percent.  ...  A study of the dispersion, attenuation, and residue of the modes provides an explanation for most of the features in the waveforms. 4:35 RRI3.  ...  An array which has a null of the interference field at its center will resolve the two arrivals for apertures considerably smaller than expected by using the Rayleigh criterion.  ... 
doi:10.1121/1.2020879 fatcat:eid6pixobjetzhkfpo6h2okzua

Discrimination of short speech‐like formant transitions

Astrid van Wieringen, Louis C. W. Pols
1992 Journal of the Acoustical Society of America  
Processing of these waveforms in the frequency-wave-number domain allows for the extraction of the dispersion curve and the various modes propagating in the plate.  ...  For a uniaxial implementation a dipole FOD sensor is positioned with its axis perpendicular to and suspended a few centimeters from a large acoustically reflecting surface.  ...  These problems can be resolved in terms of ray theory with beam displacement and mode theory in different ways.  ... 
doi:10.1121/1.405128 fatcat:dbtewzqvijhkta6op7ul3ribti

The role of spectral cues and minimum bandwidth in the auditory perception of distance

Ramiro Oscar Vergara Ferrari, Esteban Calcagno, Manuel C. Eguia
2010 Journal of the Acoustical Society of America  
It had previously been established that random location in the beam pattern causes strongly non-Rayleigh echoes for resolved scatterers whose echoes were otherwise Rayleigh distributed ͑such as a rough  ...  The normal modes of low frequency sound in shallow water are geometrically dispersive due to the presence of surface and bottom boundaries.  ... 
doi:10.1121/1.3508786 fatcat:wcm45muntjfybnrlv2hrxcjsgq

Subjective relevance of objective measures for spatial impression

Lily M. Wang, Anders C. Gade
2000 Journal of the Acoustical Society of America  
The instrument is capable of resolving the time-evolving bubble size distribution on millisecond time scales and centimeter length scales within a whitecap.  ...  With the use of transducer and hydrophone arrays, however, resolvable paths may also be exploited as additional bandwidth in a manner completely analogous to frequency bandwidth using a parallel channel  ...  Exploiting target motion for active matched-field depth estimation.  ... 
doi:10.1121/1.428749 fatcat:2246ie7m3bagxlrls5fkc3cdfu

Energy and wavelength scaling of shock-ignited inertial fusion targets

S Atzeni, A Marocchino, A Schiavi, G Schurtz
2013 New Journal of Physics  
In the high-magnetic state non-collinearity and inversion symmetry breaking stabilize each other via the Dzyaloshinskii-Moriya interaction.  ...  We disucss how this kind of multiferrolectricity can be manipulated by imputrities and light pulses and show estimates of the effect in CuO.  ...  We also demonstrate, using time correlated measurements, that the signal and idler beams generated in the spontaneous process come in correlated pairs.  ... 
doi:10.1088/1367-2630/15/4/045004 fatcat:c4lh6z3uavbktgx4didzjqxoiy

Predicting room acoustical behavior with the ODEON computer model

Graham Naylor, Jens Holger Rindel
1992 Journal of the Acoustical Society of America  
Processing of these waveforms in the frequency-wave-number domain allows for the extraction of the dispersion curve and the various modes propagating in the plate.  ...  For a uniaxial implementation a dipole FOD sensor is positioned with its axis perpendicular to and suspended a few centimeters from a large acoustically reflecting surface.  ...  These problems can be resolved in terms of ray theory with beam displacement and mode theory in different ways.  ... 
doi:10.1121/1.404931 fatcat:z4hbezklfzgu7hyy7qvos3wyo4
« Previous Showing results 1 — 15 out of 108 results