Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Joshua Isaacs"'
Publikováno v:
Applied Optics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87e49b55a7702f5435bf187c9c2b7b77
https://doi.org/10.1364/ao.491531
https://doi.org/10.1364/ao.491531
Autor:
Michael H. Helle, Gregory DiComo, Alexander Englesbe, Joshua Isaacs, Aliaksandr Mamonau, Dmitri Kaganovich, Richard Fischer, Joseph Peñano
Publikováno v:
Optica Advanced Photonics Congress 2022.
We will present a comprehensive investigation of nonlinear self-channeling in atmospheric turbulence. In particular, experimental, theoretical and numerical results show the ability of a nonlinear self-channeling beam to resist turbulence-induced spr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34630d7fc6618cb20783038ed73a0feb
https://doi.org/10.1364/lsc.2022.lsw2c.3
https://doi.org/10.1364/lsc.2022.lsw2c.3
Autor:
Jeremy Young, Antonio Oliver, Joseph Coffaro, Joseph Penano, Jason D. Schmidt, Michael Helle, Joshua Isaacs, Jason A. Tellez, Gregory DiComo, Vincent J. Urick, Larry B. Stotts
Publikováno v:
Optics Express. 29:25731
Optical Kerr effects induced by the propagation of high peak-power laser beams through real atmospheres have been a topic of interest to the nonlinear optics community for several decades. This paper proposes a new analytical model for predicting the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d10dfeba3f256eb1966d393c162d733
https://doi.org/10.1364/oe.431884
https://doi.org/10.1364/oe.431884
Publikováno v:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX.
Several recently proposed methods for detecting radioactivity at range involve driving laser induced avalanche breakdown seeded by electrons or negative ions whose density are elevated in the vicinity of a radioactive source. Using a chirped, mid-IR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd41f3bdf8ba635b8eabe1e670a52cb6
https://doi.org/10.1117/12.2526126
https://doi.org/10.1117/12.2526126
Publikováno v:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX.
A concept for all-optical remote detection of radioactive materials is presented and analyzed. The presence of excess radioactivity increases the level of negative ions in the surrounding air region. We model irradiated air to estimate the density of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4a81a89e0cfd920981dfa88b7ef3fca
https://doi.org/10.1117/12.2526350
https://doi.org/10.1117/12.2526350
Publikováno v:
Science Advances
We show that laser pulses can sensitively detect the presence of a remote radioactive source by sparking its surrounding air.
Remote detection of a distant, shielded sample of radioactive material is an important goal, but it is made difficult b
Remote detection of a distant, shielded sample of radioactive material is an important goal, but it is made difficult b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00cd900a40a5fea83020628d93ca6ce7
https://doi.org/10.1126/sciadv.aav6804
https://doi.org/10.1126/sciadv.aav6804
Autor:
Michael Helle, Phillip Sprangle, Vladimir B. Markov, Joshua Isaacs, Anatoliy Khizhnyak, Joseph Penano
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VII.
Effective performance of laser systems intended for power delivery on a distant object requires an adaptive optics system to correct the laser beam distortions caused by atmospheric perturbations along the propagation path. The turbulence-induced eff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ac6bf004bfce862704bc08282fc0d8a
https://doi.org/10.1117/12.2320357
https://doi.org/10.1117/12.2320357
Autor:
Phillip Sprangle, Joshua Isaacs
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c40808f6320a21e1339e6bad30daf4fc
https://doi.org/10.1117/12.2320350
https://doi.org/10.1117/12.2320350
Autor:
Joshua Isaacs, Phillip Sprangle
Publikováno v:
Ultrafast Bandgap Photonics III.
The effect of laser noise on the atmospheric propagation of high-power CW lasers and high-intensity short pulse lasers in dispersive and nonlinear media is studied. We consider the coupling of laser intensity noise and phase noise to the spatial and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88904e9624943290d4ee46553efc645d
https://doi.org/10.1117/12.2306505
https://doi.org/10.1117/12.2306505
Autor:
Phillip Sprangle, Joshua Isaacs
Publikováno v:
Frontiers in Optics / Laser Science.
We model irradiated air to estimate the density of negative ions and use a set of coupled rate equations to simulate the subsequent laser-induced avalanche ionization for detection of radioactive materials remotely.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::772fb7b3f66014f6527899f6090cc1d1
https://doi.org/10.1364/fio.2018.jw3a.29
https://doi.org/10.1364/fio.2018.jw3a.29