Zobrazeno 1 - 10
of 18
pro vyhledávání: '"E. C. Welch"'
Autor:
W L, Walker, K M, Schmit, E C, Welch, L A, Vonnahme, A, Talwar, M, Nguyen, D, Stojanovic, A J, Langer, N M, Cocoros
Publikováno v:
The International Journal of Tuberculosis and Lung Disease. 26:1170-1176
BACKGROUND: We examined patterns in care for individuals treated for latent TB infection (LTBI) in the US Food and Drug Administration´s Sentinel System.METHODS: Using administrative claims data, we identified patients who filled standard LTBI treat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb17eca9d5adead26da77588696ab907
https://doi.org/10.5588/ijtld.22.0259
https://doi.org/10.5588/ijtld.22.0259
Autor:
Jeremy Pigeon, Miroslav Kolesik, Sergei Tochitsky, Paris Panagiotopoulos, Ewan M. Wright, E. C. Welch, Igor Pogorelsky, Chan Joshi, Jerome V. Moloney, Mikhail Polyanskiy, Stephan W. Koch
Publikováno v:
Nature Photonics. 13:41-46
The diffraction-compensated propagation of high-power laser beams in air could open up new opportunities for atmospheric applications such as remote stand-off detection, long-range projection of high-energy laser pulses and free-space communications.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9a2ba310e66fcedbe511081a1d2026f
https://doi.org/10.1038/s41566-018-0315-0
https://doi.org/10.1038/s41566-018-0315-0
Publikováno v:
Conference on Lasers and Electro-Optics.
We report efficient second harmonic generation of picosecond CO2 laser pulses at intensities up to 50 GW/cm2 in GaSe, AgGaSe2, CdGeAs2, and Te. External energy conversion efficiency can reach 20% in AgGaSe2.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35589c24ad5a91d58b8aaa07fec16351
https://doi.org/10.1364/cleo_si.2021.sw2r.2
https://doi.org/10.1364/cleo_si.2021.sw2r.2
Publikováno v:
2018 IEEE Advanced Accelerator Concepts Workshop (AAC).
We discuss the status of the University of California, Los Angeles Neptune Laboratory CO 2 master oscillator-power amplifier (MOPA) system and recent modifications aimed to obtain quasi-single pulses with 5–10 TW in the leading 3 ps pulse. A new op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d92a52de716bee078a9c4674aaa0da5
https://doi.org/10.1109/aac.2018.8659412
https://doi.org/10.1109/aac.2018.8659412
Publikováno v:
Frontiers in Optics / Laser Science.
We report measurements of the effective nonlinear refractive indices of quadratic nonlinear crystals using four-wave mixing of a dual-frequency CO2 laser pulse. The contribution of second-order processes to the four-wave mixing efficiency is discusse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cd3aa65863b0c6fc1bfb3874bdb7178
https://doi.org/10.1364/fio.2018.jtu3a.50
https://doi.org/10.1364/fio.2018.jtu3a.50
Autor:
Paris Panagiotopoulos, Jerome V. Moloney, Misha Polyanskiy, Igor Pogorelsky, Chan Joshi, Sergei Tochitsky, E. C. Welch
Publikováno v:
Conference on Lasers and Electro-Optics.
We report the first observation of Kerr self-focusing of 3 ps TW CO 2 laser pulses in atmosphere. A centimeter diameter, 30m long, 10-μm light channel containing a few Joules of energy is generated and characterized.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04ab1dcac46c8b33477552784d21a4ee
https://doi.org/10.1364/cleo_qels.2018.fm3m.4
https://doi.org/10.1364/cleo_qels.2018.fm3m.4
Publikováno v:
Frontiers in Optics 2017.
Generation of picosecond, 5 µJ, 10 μm pulses by parametric three wave mixing in GaSe is demonstrated. Two new methods are explored in which the nonlinear interaction is seeded by either the signal or idler waves.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7edc79126785465b63de9f053787aba
https://doi.org/10.1364/fio.2017.jtu3a.71
https://doi.org/10.1364/fio.2017.jtu3a.71
Publikováno v:
Frontiers in Optics 2017.
We report measurements of the nonlinear refractive index of air, N2, O2, Kr, and Xe at a wavelength near 10 µm by four-wave mixing of an intense, 200 ps, CO2 laser beat-wave.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9d527a97789ef6a8f9dd9670a863b26
https://doi.org/10.1364/fio.2017.fw6e.3
https://doi.org/10.1364/fio.2017.fw6e.3
Autor:
Igor Pogorelsky, Jerome V. Moloney, Stephan W. Koch, Sergei Tochitsky, Paris Panagiotopoulos, Chan Joshi, Misha Polyanskiy, Miroslav Kolesik, E. C. Welch
Publikováno v:
Journal of the Optical Society of America B. 36:G40
Filamentation of a high-power laser beam in air opens the possibility of the diffraction-compensated propagation of a laser beam over long distances and as such is being considered for remote stand-off detection, lightning control, free-space communi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c10618a285a106d576015f4c462dbeb
https://doi.org/10.1364/josab.36.000g40
https://doi.org/10.1364/josab.36.000g40
Publikováno v:
Optics letters. 41(17)
We report on measurements of the nonlinear index of refraction of air, Nsub2/sub, and Osub2/subat a wavelength close to 10 μm by collinear four-wave mixing of a 200 MW COsub2/sublaser beat-wave. The use of a 200 ps long beat-wave comprising radiatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::108489dd9e9fefe319fa2d5f0a370903
https://pubmed.ncbi.nlm.nih.gov/27607938
https://pubmed.ncbi.nlm.nih.gov/27607938