Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Robert S. Afzal"'
Autor:
Neil Gitkind, Don Jander, Richard Humphreys, Dan Hu, Craig Robin, Jason D. Henrie, Andrew Jones, Eric C. Honea, Matthias P. Savage-Leuchs, Nathan Kurz, Robert S. Afzal, Khush Brar, Ravi Kasinadhuni
Publikováno v:
Components and Packaging for Laser Systems II.
Spectral Beam Combining (SBC) of fiber lasers provides a simple, robust architecture for high brightness power scaling beyond the limit of a single fiber. We review recent progress in power scaling and describe what we believe is the highest power SB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7be7f128c673fa1b94e358ac1699aef5
https://doi.org/10.1117/12.2214237
https://doi.org/10.1117/12.2214237
Autor:
Robert S. Afzal, Robert E. Gold, Brian J. Anderson, Sean C. Solomon, Thomas H. Zurbuchen, D. A. Lohr, Andrew F. Cheng, G. Bruce Andrews, Ronald B. Follas, Eleanor A. Ketchum, David E. Smith, William E. McClintock, A. G. Santo, George Gloeckler, R. Starr, Barry Mauk, John Cain, L. G. Evans, Peter D. Bedini, S. E. Jaskulek, S. Edward Hawkins, C. E. Schlemm, James B. Abshire, Mark R. Lankton, Noam R. Izenberg, W. C. Feldman, John O. Goldsten, Scott L. Murchie, Mario H. Acuña, Ralph L. McNutt
Publikováno v:
Planetary and Space Science. 49:1467-1479
The MErcury, Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission will send the first spacecraft to orbit the planet Mercury. A miniaturized set of seven instruments, along with the spacecraft telecommunications system, provide t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55e020984f1f0f7576696d2e43a461a0
https://doi.org/10.1016/s0032-0633(01)00086-1
https://doi.org/10.1016/s0032-0633(01)00086-1
Autor:
Maria T. Zuber, Catherine L. Johnson, David E. Smith, T. C. Duxbury, Xiaoli Sun, G. H. Pettengill, H. Jay Zwally, Gregory A. Neumann, Anton B. Ivanov, Oded Aharonson, Herbert Frey, Kathryn E. Fishbaugh, W. Bruce Banerdt, Peter G. Ford, Roger J. Phillips, James B. Abshire, Duane O. Muhleman, Robert S. Afzal, James B. Garvin, Sean C. Solomon, James W. Head
Publikováno v:
Science. 282:2053-2060
Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c463a437c23dccba78e17ae90d8798cf
https://doi.org/10.1126/science.282.5396.2053
https://doi.org/10.1126/science.282.5396.2053
Autor:
Mark S. Bowers, Robert S. Afzal
Publikováno v:
SPIE Proceedings.
The transient theory of stimulated Brillouin Scattering (SBS) in optical fibers is used to investigate the effects of weak feedback of an incident broadband laser field. When the linewidth of the laser approaches the Brillouin frequency shift, a weak
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a349ada7f984b8e624904672ad7ae969
https://doi.org/10.1117/12.2015825
https://doi.org/10.1117/12.2015825
Publikováno v:
SPIE Proceedings.
We report a master-oscillator/power-amplifier laser system featuring a polarizing and coilable 40-micron-core Yb-doped photonic crystal fiber as the final-stage amplifier. The laser source generates 3.4 ns pulses at a repetition rate 19 kHz, with max
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60adb2949599acd436beee6c7824c997
https://doi.org/10.1117/12.2014313
https://doi.org/10.1117/12.2014313
Autor:
Jason D. Henrie, Kush Brar, Robert S. Afzal, Eric C. Honea, Matthias P. Savage-Leuchs, Richard Humphreys, Niel Gitkind, Don Jander
Publikováno v:
Fiber Lasers X: Technology, Systems, and Applications.
Spectrally Beam Combined fiber laser provide a superior architecture for power scaling laser to high power. We present experimental results where we achieved < 3 kW, M2 = 1.35 with < 39% E-O efficiency by combining 12 individual fiber lasers into a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f9c2fc55a913b96598d83ce46fd56b4
https://doi.org/10.1117/12.2021808
https://doi.org/10.1117/12.2021808
Autor:
Eric Eisenberg, Christian E. Dilley, Jeffrey Cao, Robert S. Afzal, Khushvinder S. Brar, Donald R. Jander, Eric C. Honea, Richard Humphreys, Matthias P. Savage-Leuchs
Publikováno v:
Lasers, Sources, and Related Photonic Devices.
We describe our work on Spectral Beam Combining geometries and design implementations using multilayer dielectric gratings. With appropriate designs, power scaling beyond the single fiber limit can be achieved while maintaining near diffraction limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4654e4bd960d497f5c2bb0069259ff96
https://doi.org/10.1364/assp.2012.aw3a.1
https://doi.org/10.1364/assp.2012.aw3a.1
Publikováno v:
Applied optics. 35(9)
We have demonstrated and characterized a Q-switched Nd:YAG laser under continuous operation for over 7 billion shots. Through periodic monitoring of the laser's vital signs, the system dynamics were decoupled to identify the sources of degradation. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::744b2ae27d821857926f8d4044b90424
https://pubmed.ncbi.nlm.nih.gov/21085254
https://pubmed.ncbi.nlm.nih.gov/21085254
Autor:
Robert S. Afzal, E. Brian Treacy
Publikováno v:
Review of Scientific Instruments. 63:2157-2163
Simple modifications were made to a commercial microscope to enable injection of light from a diode laser, and demonstrate optical tweezers action. The basic properties of microscope optics are presented together with discussion of principles to be f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ae679c09162e3848be125cd5d1abceb
https://doi.org/10.1063/1.1143833
https://doi.org/10.1063/1.1143833
Autor:
Nabil M. Lawandy, Robert S. Afzal
Publikováno v:
Optics Communications. 86:307-310
We have observed ring structure formation on a dye laser beam (5850 A) propagating through ruby. We also present, to our knowledge, the first observation of transverse beam encoding by two-beam coupling where spatial rings form on a probe beam coprop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36694e9be024d5e450f7ee080adb8f42
https://doi.org/10.1016/0030-4018(91)90010-b
https://doi.org/10.1016/0030-4018(91)90010-b