An optically clocked transistor array for high-speed asynchronous label swapping: 40 Gb/s and beyond

Ryohei Urata, Ryo Takahashi, Tetsuya Suemitsu, Tatsushi Nakahara, Hiroyuki Suzuki

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


We describe the development of an optically clocked transistor array (OCTA) interface device for label swapping high-speed asynchronous burst optical packets. The OCTA integrates the three critical functions of serial-to-parallel (SP) conversion, parallel-to-serial (PS) conversion, and clock-pulse generation into a simple optoelectronic integrated circuit (OEIC) to create a single-chip interface between the input/ output baseband optical labels and a CMOS label processor. The result is a high-performance label swapping solution which is compact and low power. In this paper, a detailed investigation of the design and optimization of the circuit is first performed, followed by testing of device stability under subsystem operating conditions. Finally, demonstrations of single-channel switching speeds allowing greater than 100-Gb/s operation, 40-Gb/s SP and PS conversion with an eight-channel OCTA, and error-free label swapping of 10-Gb/s asynchronous optical packets with a prototype label swapper module are described.

Original languageEnglish
Pages (from-to)692-703
Number of pages12
JournalJournal of Lightwave Technology
Issue number6
Publication statusPublished - 2008 Mar 15


  • High electron-mobility transistor (HEMT)
  • Label swapping
  • Metal-semiconductor-metal (MSM)
  • Optical packet switching
  • Optoelectronic integrated circuit (OEIC)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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