FSO Receiver with High Optical Alignment Robustness Using High-Speed 2D-PDA and Space Diversity Technique

Toshimasa Umezawa*, Yuki Yoshida, Atsushi Kanno, Atsushi Matsumoto, Kouichi Akahane, Naokatsu Yamamoto, Tetsuya Kawanishi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A free-space optical (FSO) receiver with high optical alignment robustness configured by a single optical lens is presented, in addition to a newly developed 2-D photodetector array (2D-PDA). A 6 × 6 square-shaped aligned arrangement matrix structure in the 2D-PDA provides a large active area for photodetection. In a 1.5-m FSO demonstration, the optical alignment tolerance on the receiver's lens is evaluated to be as large as 12 mm. The multiple-output signals from the 2D-PDA are used for the maximum ratio combining method in space diversity. The system design and alignment tolerance without a mechanical beam-Tracking system are presented and the bit error rate contributed by space diversity is discussed.

Original languageEnglish
Article number9146641
Pages (from-to)1040-1047
Number of pages8
JournalJournal of Lightwave Technology
Volume39
Issue number4
DOIs
Publication statusPublished - 2021 Feb 15

Keywords

  • 2-D photodetector array
  • Free space optical communication
  • space diversity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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