Broadband analog to digital conversion with spatial-spectral holography

W. Randall Babbitt, Mark A. Neifeld, Kristian D. Merkel

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A new approach to broadband photonic-assisted analog-to-digital converter (ADC) technology is proposed and analyzed. The core of the device is a spatial spectral holographic (SSH) material, which can directly record the signals of interest in the frequency domain. An SSH-ADC acts as a frequency-domain stretch processor, which leverages the high performance of conventional ADCs by converting high bandwidth input signals to low bandwidth output signals without loss of information. Analysis of a 10 GHz bandwidth SSH-ADC predicts that 10-bit performance can be achieved with currently available materials and components. SSH-ADC technology is scalable to bandwidths over 100 GHz with recently developed SSH materials. While the SSH-ADC is a transient digitizer, the spatial parallelism of SSH materials can be utilized to enable continuous digitization.

Original languageEnglish (US)
Pages (from-to)152-157
Number of pages6
JournalJournal of Luminescence
Issue number1
StatePublished - Nov 2007


  • Analog-to-digital conversion
  • Direct digital conversion
  • Microwave signal processing
  • Optical signal processing
  • Spectral-spatial holography
  • Stretch processing

ASJC Scopus subject areas

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics


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