A simple broad-band coherence multiplexed optical access network and its scalability

Jun Ichi Kani, Katsumi Iwatsuki, Noboru Takachio, Nobuo Fujii

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


This paper proposes a novel and simply configured broad-band optical access network that uses coherence multiplexing (CM) and half-duplex bidirectional transmission. It allows the on-demand use of broad bandwidth on existing fiber-to-the-home (FTTH) access lines. The design of the proposed CM network considers degradation factors in CM systems. This paper introduces two analyses. The first one is a numerical simulation to optimize the tradeoff between available user number and fiber dispersion degradation, and the second estimates acceptable access-line loss in the network. These analyses show that 16 users × 100 Mb/s (or 12 users × 155 Mb/s) bandwidth is possible on a standard single-mode fiber access line whose loss and length are under 9 dB and 10 km (and 7 km), respectively. The feasibility and scalability of the proposed network are verified by an experiment in which eight-channel 155-Mb/s half-duplex optical packet transmission is successfully demonstrated on a 7-km standard fiber access line with bit error rates better than 1 × 10 -9. This study shows that the capacity of existing FTTH access lines that employ star couplers can be significantly enhanced.

Original languageEnglish
Pages (from-to)456-464
Number of pages9
JournalJournal of Lightwave Technology
Issue number4
Publication statusPublished - 2001 Apr
Externally publishedYes


  • Access network
  • Coherence multiplexing
  • Optical communications
  • Passive optical network

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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