Optical multi-context blind scrubbing for field programmable gate arrays

Yusuke Takaki, Minoru Watanabe

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper presents aproposal of a new optical multi-context blind scrubbing that can not only increase the soft-error tolerance of the configuration memory of field programmable gate arrays (FPGAs) but also support high-speed dynamic reconfiguration suitable for accelerating FPGA operations. The optical multi-context blind scrubbing operation uses a holographic memory as a soft-error free radiation-hardened external memory. It exploits its two-dimensional large-bandwidth optical bus. Optical multi-context blind scrubbing operation was demonstrated with four configuration contexts. The soft-error tolerance of the scrubbing operation was evaluated using a radiation tolerance experiment using two 4-MBq Americium-241 alpha particle sources. Results show the worst case mean time to repair (MTTR) of the scrubbing operation as 560 ns, which can realize sufficient soft-error tolerance in radiation-rich space environments.

Original languageEnglish
Article number9265403
JournalIEEE Photonics Journal
Issue number6
Publication statusPublished - Dec 2020
Externally publishedYes


  • Field programmable gate array
  • holography
  • optical scrubbing
  • optoelectronic device

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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