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

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

Research output: Contribution to journalArticle

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
JournalUnknown Journal
Publication statusPublished - 2004
Externally publishedYes



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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Takahashi, R., Nakahara, T., Takahata, K., Takenouchi, H., Yasui, T., Kondo, N., & Suzuki, H. (2004). 40-Gbit/s photonic random access memory for photonic packet-switched networks. Unknown Journal, 5356, 130-141. https://doi.org/10.1117/12.532544