Photonic time-delay beam-forming architectures using polarization switching arrays

Nabeel A. Riza; Nicholas Madamopoulos

doi:10.1117/12.243127

12 June 1996 Photonic time-delay beam-forming architectures using polarization switching arrays

Nabeel A. Riza, Nicholas Madamopoulos

Proceedings Volume 2754, Advances in Optical Information Processing VII; (1996) https://doi.org/10.1117/12.243127
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

Photonic time delay line (PTDL) architectures have been proposed for transmit/receive mode antenna applications. These architectures are based on two dimensional pixelated optical arrays that act as optical polarization switching elements. Such elements can be nematic liquid crystal (NLC) arrays, ferroelectric liquid crystal (FLC) arrays, and magneto-optic arrays. Optical delay lines can be formed using either free space or solid optics propagation, as well as non-polarization maintaining fiber propagation for the case of long time delays. In this paper, various optical array based optical beamformer architectures are presented and compared. These different architectures are based on Thompson polarization beamsplitters, and polarizing cube beamsplitters, for both transmissive and reflective geometries. A novel ternary time delay architecture is also introduced that can give 3^N different time delay settings. In addition, a novel wavelength multiplexing architecture using a single channel dispersive fiber PTDL in cascade with multichannel PTDL is proposed for further hardware size and weight reduction.

Citation Download Citation

Nabeel A. Riza and Nicholas Madamopoulos "Photonic time-delay beam-forming architectures using polarization switching arrays", Proc. SPIE 2754, Advances in Optical Information Processing VII, (12 June 1996); https://doi.org/10.1117/12.243127

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