Polarization dependent loss in a Ti:LiNbO3 polarization scrambler/controller

Takumi Fujiwara, Akio Watanabe, Hiroshi Mori

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We have investigated the polarization dependent loss (PDL) of a waveguide-type polarization scrambler/controller consisting of a half-wave plate (HWP) and a quarter-wave plate (QWP) in series fabricated in x-cut/z-propagating Ti-diffused LiNbO3 optical waveguides. Based on the polarization dependences of both the propagation loss coefficient and mode-mismatch loss with fiber at 1.55 μm combined with a numerical analysis, the PDL of the fabricated device is estimated to be 0.063 dB. It is shown that the low PDL is a direct consequence of a special anisotropy relation between the propagation loss and waveguide-fiber mode-mismatch loss.

Original languageEnglish
Pages (from-to)542-544
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
Publication statusPublished - 1996 Apr
Externally publishedYes

ASJC Scopus subject areas

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


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