Live electrooptic imaging system based on ultraparallel photonic heterodyne for microwave near-fields

Kiyotaka Sasagawa*, Atsushi Kanno, Tetsuya Kawanishi, Masahiro Tsuchiya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


We report on 100 × 100 pixel live electrooptic imaging (LEI), which is real-time imaging of electrical signals on a microwave circuit. The circuit's electric near-fields can be depicted in real time on a display screen at video frame rates as high as 30 frames/s. This system is based on photonics technology in which electric near-fields are applied to an electrooptic crystal plate and a sensing light beam is modulated there. The frequency of modulation is down-converted by using a photonic heterodyne of large-scale parallelism, and the spatial pattern of the electrooptic modulation is detected with a high-speed image sensor. A digital signal processor is used to extract the frequency component of interest and to animate it on the display screen. As examples, we present live pictures of electric field pattern data acquired by the LEI system in a real-time manner.

Original languageEnglish
Pages (from-to)2782-2791
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
Publication statusPublished - 2007 Dec
Externally publishedYes


  • Electromagnetic field imaging
  • Electrooptic measurement
  • Large-scale parallelism
  • Photonic heterodyne
  • Real-time imaging

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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