Picosecond all-optical gate using a saturable absorber in mode-locked laser diodes

Ichiro Ogura, Yoichi Hashimoto, Hisakazu Kurita, Takanori Shimizu, Hiroyuki Yokoyama

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


A novel application of mode-locked laser diodes (MLLD's) for all-optical gate is described. A saturable absorber (SA) shows 8-ps-absorption recovery and has a small switching energy of 0.9 pJ. For this SA used as an all-optical gate in combination with the all-optical clock recovery function of MLLD's, all-optical signal processing (demultiplexer and repeater) may be possible with a compact and robust configuration. To confirm the all-optical gate operation in MLLD's, 40 to 10 Gb/s all-optical DEMUX is successfully demonstrated.

Original languageEnglish
Pages (from-to)603-605
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number3
Publication statusPublished - 1998 Mar 1
Externally publishedYes


  • Laser diode
  • Mode-locking (mode-locked laser diode)
  • Optical communication
  • Optical gate
  • Optical signal processing
  • Saturable absorber
  • Time-division multiplexing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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