Zobrazeno 1 - 10
of 25
pro vyhledávání: '"B, Shemirani"'
Publikováno v:
Journal of Lightwave Technology. 28:2627-2639
In previous work, we studied the compensation of modal dispersion in multimode fiber (MMF) using several different configurations of optical systems that can control the amplitude, phase and polarization of the launched field. In that work, we assume
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd44e7c49e05a38680aa1c41d458c2b8
https://doi.org/10.1109/jlt.2010.2058092
https://doi.org/10.1109/jlt.2010.2058092
Autor:
Joseph M. Kahn, Mahdieh B. Shemirani
Publikováno v:
Journal of Lightwave Technology. 28:2084-2095
In previous work, a technique was proposed for compensation of modal dispersion in multimode fiber (MMF) systems by using adaptive optics. A spatial light modulator (SLM), with amplitude and phase adjustable over discrete blocks, was used to control
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c34d59a9e7cc571f77bb7a65ba99aa0
https://doi.org/10.1109/jlt.2010.2051795
https://doi.org/10.1109/jlt.2010.2051795
Autor:
Mahdieh B. Shemirani, Joseph M. Kahn
Publikováno v:
Journal of Lightwave Technology. 27:5461-5468
Previously, we proposed a field-coupling model for propagation in graded-index multimode fiber (MMF), analogous to the principal states model for polarization-mode dispersion (PMD) in single-mode fiber. That model was based on the concept of first-or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::199f383d881bec1a7669e80b11987d3f
https://doi.org/10.1109/jlt.2009.2030146
https://doi.org/10.1109/jlt.2009.2030146
Publikováno v:
Journal of Lightwave Technology. 27:1248-1261
Power-coupling models are inherently unable to describe certain mode coupling effects in multimode fiber (MMF) when using coherent sources at high bit rates, such as polarization dependence of the impulse response. We develop a field-coupling model f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba6a8ec8435b8557e7bfb6ecd7ba4df1
https://doi.org/10.1109/jlt.2008.2005066
https://doi.org/10.1109/jlt.2008.2005066
Publikováno v:
Optical Fiber Communication Conference.
In mode-division-multiplexed systems using coherent detection, strong mode coupling is beneficial. Mode coupling reduces modal dispersion, minimizing signal processing complexity. In combination with modal dispersion, mode coupling creates frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7396fef8ba3fa3d2a7a6af92f2daeb7
https://doi.org/10.1364/ofc.2012.ow3d.3
https://doi.org/10.1364/ofc.2012.ow3d.3
Autor:
C. V. Stager, B. Shemirani, Zin Tun, H. Lin, Malcolm F. Collins, J. D. Garrett, W. J. L. Buyers
Publikováno v:
Physical Review B. 48:16500-16504
Elastic neutron-scattering and magnetization measurements have been performed on a single crystal of UPd 2 Si 2 in fields along the c axis. In zero field there is a simple body-centered antiferromagnetic structure for temperatures up to 108 K. Betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c23fc409ec9a0dbf238a56be3b70f691
https://doi.org/10.1103/physrevb.48.16500
https://doi.org/10.1103/physrevb.48.16500
Publikováno v:
Physical Review B. 47:8672-8675
Elastic-neutron-scattering and magnetization measurements have been performed on a single crystal of ${\mathrm{UPd}}_{2}$${\mathrm{Si}}_{2}$ in the 12--160-K temperature range. Two magnetically ordered phases are observed with the magnetic moment par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8c2c501fc4c54f12394e271a9d00d6d
https://doi.org/10.1103/physrevb.47.8672
https://doi.org/10.1103/physrevb.47.8672
Autor:
B. Shemirani, F. P. Koffyberg
Publikováno v:
Materials Research Bulletin. 27:693-698
Tin doped In2TeO6 is prepared at 700° C as a n-type semiconductor. Its carrier mobility is less than 10−3 cm2/Vs. From photo-electrochemical experiments the optical transition across the band gap is determined to be direct forbidden at 1.56 eV. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f0452518c1529e8da50e470161a3097
https://doi.org/10.1016/0025-5408(92)90076-c
https://doi.org/10.1016/0025-5408(92)90076-c
Autor:
Joseph M. Kahn, Mahdieh B. Shemirani
Publikováno v:
Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest.
We model multimode propagation, including spatial- and polarization-mode coupling. At low coupling, the impulse response is polarization-dependent; differential mode delays (DMDs) scale linearly with length. At high coupling, DMDs scale as the square
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b75c4fc11c50a8187f14359d76f7a51d
https://doi.org/10.1364/fio.2009.ftup3
https://doi.org/10.1364/fio.2009.ftup3
Autor:
Farshid Aryanfar, Mahdieh B. Shemirani
Publikováno v:
2008 IEEE Antennas and Propagation Society International Symposium.
A passive DFT processor using a special realization of a Rotman lens is proposed which provides higher resolution with less complexity in compare to the traditional Butler matrices implementation which their complexity increases exponentially with re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03bd27392ec89647a511f1fee9179e0d
https://doi.org/10.1109/aps.2008.4619481
https://doi.org/10.1109/aps.2008.4619481