Zobrazeno 1 - 10
of 274
pro vyhledávání: '"G, Wickham"'
Publikováno v:
Sexually Transmitted Diseases.
BACKGROUND Expedited partner therapy (EPT), the practice of prescribing antibiotics for sexual partners of patients, is underutilized in Georgia. This qualitative study in a large urban institution aimed to (1) characterize the clinical specialties t
Autor:
K. Harley, G. Wickham
Battered and bruised by injuries (often self-inflicted) sustained in the first half of the twentieth century since 1950 sociology in Australia has fought its way back into the academic mainstream. This has not been easy; its fortunes seem forever mix
Autor:
S.B. Weiss, William H. Long, J. Sollee, Gregory D. Goodno, H. Komine, Eric Cheung, R. Simpson, Hagop Injeyan, Stuart J. McNaught, J. Anderegg, Charles Phillip Asman, M. McClellan, S. Brosnan, Shawn M. Redmond, Mark E. Weber, Michael G. Wickham, D. Hammons
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 13:460-472
Recent progress in developing phased arrays of high-brightness solid-state lasers is summarized. We address the prospects for continued brightness-scaling via a model that extrapolates measured results to large numbers of array elements and provides
Autor:
Rodger C. Hilyard, R.J. St. Pierre, Jacqueline G. Berg, Robert Senn, Michael G. Wickham, George M. Harpole, H. Injeyan, Mark Weber, David W. Mordaunt
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 3:53-58
The diode array pumped kilowatt laser (DAPKL) has demonstrated more than an order of magnitude increase in brightness and average power for short pulse diode-pumped solid-state lasers since its inception in 1991. Significant advances in component tec
Autor:
Gregory D. Goodno, Benjamin Pulford, Anthony D. Sanchez, Angel Flores, Dane W. Hult, Chunte A. Lu, James G. Ho, Joshua E. Rothenberg, David Burchman, Ken Rowland, Craig Robin, Peter A. Thielen, Michael G. Wickham
Publikováno v:
Optics letters. 37(18)
We demonstrate coherent beam combining using a two-dimensionally patterned diffractive optic combining element. Fifteen Yb-doped fiber amplifier beams arranged in a 3×5 array were combined into a single 600 W, M2=1.1 output beam with 68% combining e
Autor:
Dane W. Hult, Angel Flores, Benjamin Pulford, James G. Ho, Chunte Lu, Michael G. Wickham, Joshua E. Rothenberg, Gregory D. Goodno, David Burchman, Ken Rowland, Craig Robin, Anthony D. Sanchez, Peter A. Thielen
Publikováno v:
Lasers, Sources, and Related Photonic Devices.
A two-dimensionally patterned diffractive optical element (DOE) was used to coherently combine a 3×5 array of fifteen Yb-doped fiber amplifier beams into a 0.6-kW, M2=1.1 output beam.
Publikováno v:
Heart, lungcirculation. 21(6-7)
Although Dr Albert Hyman in New York is believed to have built the first cardiac pacemaker in 1932, he acknowledges Dr Mark Lidwell in Sydney, Australia as having not only built a pacemaker, but also successfully used it to resuscitate a newborn infa
Autor:
A. G. Wickham, David C. Clary
Publikováno v:
The Journal of Chemical Physics. 98:420-426
Analytical rate coefficient expressions are derived at low temperatures for the fast reactions of a 2Π molecule with each of a structureless ion, a 2Π molecule, and a 1Π molecule. The procedure, based on classical capture theory, involves perturba
Autor:
Mark E. Weber, Joshua E. Rothenberg, Peter A. Thielen, Michael G. Wickham, Gregory D. Goodno, Stuart J. McNaught
Publikováno v:
Lasers, Sources and Related Photonic Devices.
A 1.26-kW, multi-stage Yb fiber MOPA was coherently combined using active polarization and phase control with 94% visibility to a second fiber amplifier, consistent with estimated decoherence effects from fiber nonlinearity, linewidth, and phasing ac
Autor:
Michael G. Wickham
Publikováno v:
Conference on Lasers and Electro-Optics 2010.
Two significant coherent combining solid state laser systems will be described. One approach uses a fiber optic amplifier array and the other uses 7 tiled slab amplifier chains. The first of these demonstrated very high efficiency and near perfect be