Impact of wave propagation delay on latency in optical communication systems

Tetsuya Kawanishi, Atsushi Kanno, Yuki Yoshida, Ken Ichi Kitayama

研究成果: Conference contribution

8 被引用数 (Scopus)


Latency is an important figure to describe performance of transmission systems for particular applications, such as data transfer for earthquake early warning, transaction for financial businesses, interactive services such as online games, etc. Latency consists of delay due to signal processing at nodes and transmitters, and of signal propagation delay due to propagation of electromagnetic waves. The lower limit of the latency in transmission systems using conventional single mode fibers (SMFs) depends on wave propagation speed in the SMFs which is slower than c. Photonic crystal fibers, holly fibers and large core fibers can have low effective refractive indices, and can transfer light faster than in SMFs. In free-space optical systems, signals propagate with the speed c, so that the latency could be smaller than in optical fibers. For example, LEO satellites would transmit data faster than optical submarine cables, when the transmission distance is longer than a few thousand kilometers. This paper will discuss combination of various transmission media to reduce negative impact of the latency, as well as applications of low-latency systems.

ホスト出版物のタイトルOptical Metro Networks and Short-Haul Systems V
出版ステータスPublished - 2013 7月 4
イベントOptical Metro Networks and Short-Haul Systems V - San Francisco, CA, United States
継続期間: 2013 2月 52013 2月 7


名前Proceedings of SPIE - The International Society for Optical Engineering


OtherOptical Metro Networks and Short-Haul Systems V
国/地域United States
CitySan Francisco, CA

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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