Journal ArticleDOI
Spatial optical CDMA
TLDR
A method for optical signaling that allows multiple transmitters to simultaneously use the same noncoherent receiving aperture based on the properties of laser speckle interference patterns is investigated.Abstract:
A method for optical signaling is investigated that allows multiple transmitters to simultaneously use the same noncoherent receiving aperture. The signaling is based on the properties of laser speckle interference patterns. Capacity for an interference limited system is explored for a correlation receiver based on random coding. A synchronization scheme is presented that allows a practical implementation of the proposed optical multiple access system. >read more
Citations
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Journal ArticleDOI
Hybrid wavelength hopping/time spreading schemes for use in massive optical networks with increased security
L. Tancevski,Ivan Andonovic +1 more
TL;DR: Initial investigations indicate that the system can be so configured to allow high level of protection against determined attack, with this being especially true for an asymmetric system.
Journal ArticleDOI
Two-dimensional spatial signature patterns
Guu-Chang Yang,Wing C. Kwong +1 more
TL;DR: The relationships between two-dimensional binary discrete auto- and cross-correlation arrays and their corresponding "sets" for OOSPCs are developed and some of them achieve the upper bounds with equality and are thus optimal and hence can be used in applications requiring, for example, frequency-hopping patterns.
Journal ArticleDOI
Code-Empowered Lightwave Networks
TL;DR: The obtained results show that the flexibility of OCDMA and the large offered cardinality can be a solution to the needs of local area and access networks.
Journal ArticleDOI
Double-weight signature pattern codes for multicore-fiber code-division multiple-access networks
Wing C. Kwong,Guu-Chang Yang +1 more
TL;DR: Two new families of "double-weight" OOSPCs are constructed without the assumption of identical weight for all signature patterns in a code set, especially useful for optical CDMA networks with multiple performance requirements.
Patent
High capacity spread spectrum optical communications system
TL;DR: In this paper, the authors describe methods and apparati for spatially encoding and decoding spread spectrum communication signals using broad band light sources, which involve the use of orthogonal spatial wavelets, which are preferably discrete attenuation functions of light from different sources.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
The physics of liquid crystals
P. G. de Gennes,Richard Alben +1 more
TL;DR: In this paper, the authors define an order parameter statistical theories of the nematic order phenomonological description of the nematic-isotopic mixtures and describe the properties of these mixtures.
ReportDOI
Statistical properties of laser sparkle patterns
TL;DR: In this article, the first order statistics of the observed electric-field strength, the observed light intensity, and observed light phase are examined, and the autocorrelation functions of the complex field and intensity processes are investigated, and that of the electric field is found to be proportional to the Fourier transform of the light intensity distribution incident on the scattering surface.
Book ChapterDOI
Statistical Properties of Laser Speckle Patterns
TL;DR: In this article, the first-order statistics of the complex amplitude, intensity and phase of speckle are derived for a free-space propagation geometry and for an imaging geometry.
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