40-Gbit/s photonic random access memory for photonic packet-switched networks

R. Takahashi*, T. Nakahara, K. Takahata, H. Takenouchi, T. Yasui, N. Kondo, H. Suzuki

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


We present a photonic random access memory (RAM) that can write and read high-speed asynchronous burst optical packets freely by specifying addresses. The photonic RAM consists of an optical clock-pulse generator, an all-optical serial-to-parallel converter, a photonic parallel-to-serial converter, all developed by us, and a CMOS RAM as a storage medium. Unlike conventional optical buffers, which merely function as optical delay lines, the photonic RAM provides various advantages, such as compactness, large capacity, long-term storage, and random access at an arbitrary timing for ultrafast asynchronous burst optical packets. We experimentally confirm its basic operation for 40-Gbit/s 16-bit optical packets.

Original languageEnglish
Pages (from-to)130-141
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2004
Externally publishedYes
EventOptoelectronic Integrated Circuits VI - San Jose, CA, United States
Duration: 2004 Jan 262004 Jan 26


  • Optical buffer memory
  • Optical clock generation
  • Optical data processing
  • Parallel-to-serial conversion
  • Photonic packet switching
  • Serial-to-parallel conversion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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