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Your search keyword '"Ilchenko, Vladimir S."' showing total 2 results
Start Over Author "Ilchenko, Vladimir S." Search Limiters Full Text Topic amplitude modulation
2 results on '"Ilchenko, Vladimir S."'

1. Single-Sideband Electro-Optical Modulator and Tunable Microwave Photonic Receiver.

Author

Savchenkov, Anatoliy A., Matsko, Andrey B., Liang, Wei, Ilchenko, Vladimir S., Seidel, David, and Maleki, Lute

Subjects
SINGLE-sideband radio, PHOTONICS, RESONATORS, AMPLITUDE modulation, MICROWAVE receivers, RADIOFREQUENCY spectroscopy, SPECTRUM analyzers, LIGHT modulators
Abstract

We report on the study of widely tunable, resonant single-sideband electro-optical modulators based on whispering gallery mode (WGM) resonators, made out of electro-optically active materials. The modulation process involves interaction of different WGM families with an externally applied microwave field. The tunability results from the unequal response of the mode families to either a temperature change or to an applied voltage. We show that the modulator can be used as an efficient microwave photonic receiver that operates either in direct or coherent regime. Due to its resonant nature, the high-Q electro-optical modulator also can be used as a resolution booster for a low-resolution RF spectrum analyzer. [ABSTRACT FROM PUBLISHER]

Published
2010
Full Text
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2. Multiplexing of spatial modes in the mid-IR region

Author

Loyiso Maweza, Bienvenu Ndagano, Carmelo Rosales-Guzmán, Lucas Gailele, Andrew Forbes, Angela Dudley, Kudryashov, Alexis V., Paxton, Alan H., and Ilchenko, Vladimir S.

Subjects
Physics, business.industry, Bandwidth (signal processing), Optical communication, Physics::Optics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, Multiplexing, Spatial multiplexing, 010309 optics, Amplitude modulation, Optics, 0103 physical sciences, Orbital angular momentum multiplexing, 0210 nano-technology, business, Data transmission
Abstract

Traditional optical communication systems optimize multiplexing in polarization and wavelength both trans- mitted in fiber and free-space to attain high bandwidth data communication. Yet despite these technologies, we are expected to reach a bandwidth ceiling in the near future. Communications using orbital angular momentum (OAM) carrying modes offers infinite dimensional states, providing means to increase link capacity by multiplexing spatially overlapping modes in both the azimuthal and radial degrees of freedom. OAM modes are multiplexed and de-multiplexed by the use of spatial light modulators (SLM). Implementation of complex amplitude modulation is employed on laser beams phase and amplitude to generate Laguerre-Gaussian (LG) modes. Modal decomposition is employed to detect these modes due to their orthogonality as they propagate in space. We demonstrate data transfer by sending images as a proof-of concept in a lab-based scheme. We demonstrate the creation and detection of OAM modes in the mid-IR region as a precursor to a mid-IR free-space communication link.

Published
2017

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