Analysis of a true time delay photonic beamformer for transmission of a linear frequency-modulated waveform

Ruth Rotman, Oded Raz, Moshe Tur

Research output: Contribution to journalArticlepeer-review

Abstract

A generalized conversion matrix (GCM) and numerical analysis are used to study the distortions suffered by a linear frequency-modulated radio frequency (RF) pulse while propagating through photonic links to be used in wideband phased arrays. The analysis shows the effects of dispersion of an orders, coherent crosstalk and nonlinearity of the optical components on the RF pulse, and the high performance needed to achieve acceptable RF performance of the temporal (impulse) response. The effects of the electrical-to-optical (E/O) and optical-to-electrical (O/ E) conversions are also considered. Using the GCM, the optical amplitude and phase fluctuations are converted into their RF counterparts, thereby reducing the optical problem into the well-understood RF domain. A photonic wavelength-controlled true delay device is experimentally shown to achieve good RF performance over a 4-GHz bandwidth, with predicted sidelobe levels below 30 dB.

Original languageEnglish
Pages (from-to)4026-4036
Number of pages11
JournalJournal of Lightwave Technology
Volume23
Issue number12
DOIs
StatePublished - Dec 2005

Keywords

  • Microwave communication
  • Optical communications
  • Optical devices
  • Optical distortion
  • Optical modulation
  • Phase modulation

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