Letters

Optical Review

, Volume 21, Issue 4, pp 425-428

First online:

RF spectral modulation caused by delayed interference and photodetection of optical noise

  • Keisuke NoseAffiliated withDepartment of Material and Life Science, Graduate School of Engineering, Osaka University
  • , Yasuyuki OzekiAffiliated withDepartment of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo
  • , Yasuo KanematsuAffiliated withDepartment of Material and Life Science, Graduate School of Engineering, Osaka University
  • , Yoshizo TakaiAffiliated withDepartment of Material and Life Science, Graduate School of Engineering, Osaka University
  • , Kazuyoshi ItohAffiliated withDepartment of Material and Life Science, Graduate School of Engineering, Osaka University

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Abstract

We demonstrate that an RF spectral fringe appears when a nonpolarized optical noise and its delayed replica are combined and photo-detected without any polarization control. A theoretical analysis explains the visibility of the fringe and its insensitivity to polarization.

Keywords

spectral interferometry group delay measurement optical noise