Authors

S. Fathpour;N. A. Riza

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Abbreviated Journal Title

Opt. Eng.

Keywords

Fourier optics and signal processing; analog optical signal processing; continuous optical signal processing; PHASED-ARRAY ANTENNAS; DELAY-LINE; FIBER GRATINGS; TIME DELAYS; SWITCHES; ARCHITECTURES; FEEDER; PRISM; LASER; Optics

Abstract

Proposed is silicon-photonics-based phased array antenna beamforming for high-resolution long-range radars with wide instantaneous radio frequency (rf) bandwidth. Specifically, the proposed silicon-photonics beamformer platform offers the potential for cost-effective monolithic chip-scale integration of photonic delay lines, 2 x 2 optical switches, variable optical attenuators, and optical amplifiers that form the base unit of a rf transmit/receive array signal processor. In effect, the proposed silicon-photonics devices empower the design of a powerful proposed photonic beamformer with one time-delay unit per antenna element. Device-level designs studies are shown that promise meeting the high-resolution radar mission-critical requirements via time delays of up to 2.5 ns, switching times of less than 100 ns, optical isolations as good as 50 dB, and optical gains of up to 6 dB. Longer delays are achieved off chip using optical fibers.

Journal Title

Optical Engineering

Volume

49

Issue/Number

1

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000274267000020

ISSN

0091-3286

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