Increasing multimode fiber transmission capacity by mode selective spatial light phase modulation

Author(s): Stepniak, G.; Maksymiuk, L.; Siuzdak, J.;

Abstract:

“We propose spatial light modulation with binary phase filters to increase the transmission bandwidth of multimode fibers. In the experiment more than 300 % of bandwidth enhancement is obtained.”

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Publication: ECOC Proceedings
Issue/Year: 36th European Conference and Exhibition on Optical Communication (ECOC), 2010
DOI: 10.1109/ECOC.2010.5621465

A SAR multilook optronic processor for operational Earth monitoring applications

Author(s): Linda Marchese, Pascal Bourqui, Sandra Turgeon, Michel Doucet, Carl Vachon, François Châteauneuf, Alain Bergeron, Bernd Harnisch and Martin Suess.

Abstract:

“Synthetic Aperture Radar (SAR) is the only remote sensing technology that can provide high resolution images in adverse weather conditions and in day or night times. It is thus is a powerful tool for Earth monitoring. Certain applications, such as disaster relief, military reconnaissance and ice-flow and ship monitoring require a continuous flow of high-resolution images covering large areas; however, given the large amount of complex data generated and system limitations of data bandwidth and processing speed, not all the requirements can be met at the same time. In addition, multiple user requests are often submitted to the SAR system platform, and not all can be addressed, again due to limitations of area coverage. Increasing the speed of SAR processors and processing on-board are two ways to improve the SAR data throughput and therefore to meet the operational needs of all users. This paper discusses an optronic SAR processor capable of rapidly processing full-scene multi-looked images. Details of the processor design and image results are discussed. Estimations for speed and image throughput are provided, all presented in the context of the requirements for operational service of the various applications.”

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Publication: SPIE Proceedings
Issue/Year:Proc. SPIE, Volume 7829, 782904 (2010)
DOI: 10.1117/12.866986

Imaging through turbid layers by scanning the phase conjugated second harmonic radiation from a nanoparticle

Author(s): Chia-Lung Hsieh, Ye Pu, Rachel Grange, Grégoire Laporte, Demetri Psaltis

Abstract:

“We demonstrate imaging through a turbid layer by using digital phase conjugation of the second harmonic field radiated from a beacon nanoparticle. We show that the phase-conjugated focus can be displaced from its initial position by illuminating the same region of the turbid layer with an angular offset. An image is obtained by scanning the phase-conjugated focus through the turbid layer in a region around the nanoparticle. We obtain a clear image of the target by measuring the light transmitted through it when scanning the focused beam.”

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Publication: Optics Express
Issue/Year: Optics Express, Vol. 18, Issue 20, pp. 20723-20731 (2010)
DOI: 10.1364/OE.18.020723