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Compressive inverse scattering using ultrashort pulses
2010
Computational Imaging VIII
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The main contribution of this paper is, therefore, to analyze the wideband inverse scattering problem from compressive sensing perspective. ...
Two distinct imaging strategies have been commonly used: narrow band inverse scattering approaches using a large number of transmitters and receivers, or wideband imaging approaches with smaller number ...
Narrow band inverse scattering approach has been recently analyzed from compressive sensing perspective, 10, 11 which demonstrates that sparse objects can be reconstructed significantly well using smaller ...
doi:10.1117/12.849068
dblp:conf/cimaging/JinLAY10
fatcat:opsif5ot55dujeyt3fots6lx6u
ULTRASHORT MICROWAVE PULSE GENERATION BY PASSIVE PULSE COMPRESSION IN A COMPACT REVERBERANT CAVITY
2015
Electromagnetic Waves
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The long duration input pulse into the cavity is created using time-reversal techniques, which allows the waveform to contain the inverse profile of the cavity phase distortion. ...
When fed back into the cavity, the wave focusing at the output port results in a compressed ultrashort pulse with enhanced peak amplitude. ...
A passive approach is to use a dispersive waveguide structure, where an input pulse containing the inverse dispersion profile is compressed into a short pulse with enhanced peak power as a result of the ...
doi:10.2528/pier15092406
fatcat:daz2j3qkvbazff2wsqi7deivue
Spatiotemporal Coherent Control of Light through a Multiple Scattering Medium with the Multispectral Transmission Matrix
2016
Physical Review Letters
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Using a single spatial light modulator, our approach enables the full control of both spatial and spectral properties of an ultrashort pulse transmitted through the medium. ...
We report broadband characterization of the propagation of light through a multiply scattering medium by means of its Multi-Spectral Transmission Matrix. ...
This approach allows the temporal compression of an ultrashort pulse at a given position by iteratively optimizing the input wave front [26] [27] [28] , or alternatively by using digital phase conjugation ...
doi:10.1103/physrevlett.116.253901
pmid:27391722
fatcat:y5cnmolhunenrdelkjmxpt3aqq
Propagation Technique for Ultrashort Pulses II: Numerical Methods to Solve the Pulse Propagation Equation
2008
Computational Methods in Science and Technology
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We also numerically investigate an important technique to create ultrashort pulses, which is known as the pulse compression. ...
It is based on high order soliton propagation in Kerr media when the effect of stimulated Raman scattering is taken into account. ...
Under the influence of this effect the pulse is time compressed and its width decreases to a lower value. This phenomenon is used in practice in creating the ultrashort pulses. ...
doi:10.12921/cmst.2008.14.01.13-19
fatcat:zjkqwofmtngzfatq4s64a2fdim
Page 265 of Applied Physics. A and B Vol. B58, Issue 3
[page]
1994
Applied Physics. A and B
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One synchrotron-based approach would use a rapidly- rotating grazing-incidence mirror and a diffraction grat- ing to compress X-ray pulses by a factor of ~100 [58]. ...
For example, a short, intense laser pulse can be used to ionize a gas to create a cold plasma. Recombination in this plasma can result in population inversion [7]. ...
Volume-chirped Bragg gratings: monolithic components for stretching and compression of ultrashort laser pulses
2014
Optical Engineering: The Journal of SPIE
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pulses. ...
CBGs recorded in photo-thermo-refractive glass can be used in the spectral range from 0.8 to 2.5 μm with the diffraction efficiency exceeding 90%, and provide stretching up to 1 ns and compression down ...
In this technique, low-power ultrashort pulses are stretched ("chirped") in time and space using dispersive optical elements. ...
doi:10.1117/1.oe.53.5.051514
fatcat:7bzqbkb7ozgkfgwbi5lnjqmioq
Achieving 50 femtosecond resolution in MeV ultrafast electron diffraction with a double bend achromat compressor
[article]
2020
arXiv
pre-print
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Such an ultrashort and ultrastable electron beam allows us to achieve 50 femtosecond (FWHM) resolution in MeV ultrafast electron diffraction where lattice oscillation at 2.6 THz corresponding to Bismuth ...
We propose and demonstrate a novel scheme to produce ultrashort and ultrastable MeV electron beam. ...
In addition to MeV UED, ultrashort and ultrastable electron beam is also essential for external injection in plasma acceleration, THz-driven acceleration, inverse Compton scattering x-ray source, etc. ...
arXiv:2003.08046v1
fatcat:rzmmkfu35baolcvzouyhy2d5lm
Single-shot real-time femtosecond imaging of temporal focusing
2018
Light: Science & Applications
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laser pulse in a dynamic scattering medium. ...
As the only currently available real-time, passive imaging modality with a femtosecond exposure time, T-CUP was used to record the first-ever movie of non-repeatable temporal focusing of a single ultrashort ...
To solve this problem, compressed sensing is used. ...
doi:10.1038/s41377-018-0044-7
pmid:30839588
pmcid:PMC6107054
fatcat:z2hkkapco5ekbk3wbh6zxmmj6m
Ultrashort Pulses
[chapter]
2012
CO2 Laser - Optimisation and Application
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Acknowledgements This work is supported by the US DOE contract DE-AC02-98CH10886 and by the BNL Laboratory Directed R&D (LDRD) grant #07-004. ...
be possible to employ these phenomena to further compress ultrashort pulses. ...
In a typical CO 2 laser, an electric discharge is used to create population inversion. ...
doi:10.5772/37648
fatcat:ttyko2c3jnd27oy3vye6hufaky
Non-equilibrium ultrashort pulse generation strategies in VECSELs
2017
Optica
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The classical laser gain picture fails, however, when a high peak intensity optical pulse of duration shorter than the intrinsic carrier scattering time interacts with electrons in the conduction and holes ...
We present the optimization of ultrashort mode-locked pulses in a vertical external cavity surface emitting laser cavity with a saturable absorber mirror by modelling non-equilibrium quantum dynamics of ...
Among these is a train of 60 fs pulses under a picosecond envelope [3] and single 107 fs pulses that were externally compressed down to 96 fs [15] . ...
doi:10.1364/optica.4.000412
fatcat:xejiaxz4uvh4fguq2pq4z2azrm
Remote characterization and dispersion compensation of amplified shaped femtosecond pulses using MIIPS
2006
Optics Express
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We report on the remote characterization and dispersion compensation (pulse compression) of femtosecond pluses using multiphoton intrapulse interference phase scan (MIIPS). ...
We consider this method for remote characterization and dispersion compensation to be an important step towards the development of reliable applications requiring the propagation of ultrashort pulses to ...
Once φ(ω) is known, the pulses are automatically corrected by applying the inverse of φ(ω) using the shaper. Typically, the first iteration yields compressed pulses within 20% of the transform limit. ...
doi:10.1364/oe.14.008885
pmid:19529268
fatcat:a5dnceqapfffzbhojqr3bd2rhi
Influence of Self-steepening and Higher Dispersion Effects on the Propagation Characteristics of Solitons in Optical Fibers
2016
Computational Methods in Science and Technology
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Moreover, we can use third order dispersion to compress pulses as well as changing the frequency. ...
In this work we use the generalized nonlinear Schrödinger equation to study propagation of ultrashort optical pulses in the presence of Raman scattering and third -order dispersion effects. ...
However, we can use this phenomenon to compress pulses as well as change the frequency. ∂U ∂ ξ = 1 6 ∂ 3 U ∂ τ 3 + iN |U | 2 U. (8)
IV. ...
doi:10.12921/cmst.2016.0000063
fatcat:wgrvlddchnabnal7oper7zxafe
Sensitivity of SHG-FROG for the characterization of ultrahigh-repetition-rate telecommunication laser sources
2004
Optical fiber technology (Print)
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Using a commercially-available optical spectrum analyzer in the SHG-FROG setup, incident pulses with energies of only 125fJ and 190fJ, which correspond to the beat signal and the 1.3ps pulse train, respectively ...
the sensitivity of second-harmonic generation frequencyresolved optical gating (SHG-FROG) for the complete intensity and phase characterization of both a sinusoidal beat signal and a train of 1.3 ps pulses ...
Let us remark that the intensity and phase profiles show compressed pulses without pedestal or chirp. ...
doi:10.1016/j.yofte.2003.08.001
fatcat:zvxb5m3k2jfo5pwpznalsx5voq
Transmission matrix approaches for nonlinear fluorescence excitation through multiple scattering media
2018
Optics Letters
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Several matrix approaches were developed to control light propagation through multiple scattering media under illumination of ultrashort pulses of light. ...
We then demonstrate point-scanning imaging of such fluorescent microbeads located after a thick scattering medium, at a depth where conventional imaging would be impossible because of scattering effects ...
For an ultrashort pulse, it leads to a temporal broadening, in addition to a drastic loss of fluence. ...
doi:10.1364/ol.43.002831
pmid:29905700
fatcat:3rfk3daovrf47owf6us7k6fati
Picosecond and femtosecond Fourier pulse shape synthesis
1987
Revue de Physique Appliquée
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We describe picosecond pulses shaped using a fiber and grating pulse compressor and femtosecond pulses shaped using a nondispersive grating compressor. The discussion includes ...
Abstract. 2014 We review our work on the synthesis of arbitrarily shaped, coherent optical pulses, by spatial filtering in a grating pulse compressor. ...
We have applied this technique to investigate the phase spectrum of compressed pulses in the presence of intense stimulated Raman scattering (SRS) in a 145-meter fiber [14] . ...
doi:10.1051/rphysap:0198700220120161900
fatcat:gid7xts2grgsvdx6xzhacr37nu
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