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Research Interests:
In this paper performance and capacity of the three standards for wireless local loop (WLL) applications have been investigated, both qualitatively and quantitatively. The qualitative evaluation consists of detailed comparison of... more
In this paper performance and capacity of the three standards for wireless local loop (WLL) applications have been investigated, both qualitatively and quantitatively. The qualitative evaluation consists of detailed comparison of parameters of each standard and their relevance in WLL applications. In the quantitative analysis detailed simulations have been performed covering diversified sets of conditions. The results of both types
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A congruently grown LiNbO3:Fe:Mn crystal with high Fe concentrations is experimentally tested to show the improvement in M/# and sensitivity. Particularly, the variation of sensitivity versus recording and sensitizing intensities is... more
A congruently grown LiNbO3:Fe:Mn crystal with high Fe concentrations is experimentally tested to show the improvement in M/# and sensitivity. Particularly, the variation of sensitivity versus recording and sensitizing intensities is investigated in detail.
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Research Interests:
We present compact slit-less spectrometers using cylindrical beam holograms with several advantages over conventional spectrometers. We demonstrate large spectral range spectrometers using spatially multiplexed cylindrical beam holograms... more
We present compact slit-less spectrometers using cylindrical beam holograms with several advantages over conventional spectrometers. We demonstrate large spectral range spectrometers using spatially multiplexed cylindrical beam holograms without adding any moving part in spectroscopic systems.
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ABSTRACT
ABSTRACT
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... Function Reinforcement Learning Sharareh Babvey, Omid Momtahan", Mohammad R. Meybodf *Ami?- Kabir University of Technology, Tehran, Iran Georgia Institute of Technology, Atlanta, USA E-mail:omid@ece.gatech.edu .. ...
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We introduce a multiple order coded aperture (MOCA) spectrometer. The MOCA is a system that uses a multiplex hologram and a coded aperture to increase the spectral range and throughput of the system over conventional spectrometers while... more
We introduce a multiple order coded aperture (MOCA) spectrometer. The MOCA is a system that uses a multiplex hologram and a coded aperture to increase the spectral range and throughput of the system over conventional spectrometers while maintaining spectral resolution. This results in an order of magnitude reduction in system volume with no loss in resolution.
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ABSTRACT
Research Interests:
ABSTRACT
ABSTRACT
ABSTRACT
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We present experimental demonstrations of spectral diversity filters with spherical beam volume holograms for multimodal multiplex spectroscopy. Major properties of filters under diffuse-light illumination are discussed. The comparisons... more
We present experimental demonstrations of spectral diversity filters with spherical beam volume holograms for multimodal multiplex spectroscopy. Major properties of filters under diffuse-light illumination are discussed. The comparisons of spectral diversity between the transmission geometry holograms and the reflection geometry holograms are also studied. The results show that there is a trade-off between the degree of the spatial coherence of the source and the spectral diversity of the filter. We also conclude that the reflection geometry holograms have better spectral diversity and less sensitivity to the spatial coherence of the source.