Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch

Koki Sugiyama, Takafumi Chiba, Ken Tanizawa, Keijiro Suzuki, Takayuki Kawashima, Shojiro Kawakami, Kazuhiro Ikeda, Hitoshi Kawashima, Hiroshi Takahashi, Hiroyuki Tsuda

Research output: Contribution to journalLetter

Abstract

We propose a compact polarization diversity circuit for a silicon waveguide device. It consists of silica waveguides and photonic crystal waveplates, and can convert input light with various polarization states into two output light signals with the same polarization. Setting these circuits at the front and rear of two silicon optical switches, the polarization dependence in the switch can be dramatically suppressed. We fabricated polarization diversity circuits for a 4×4 silicon optical switch and realized a polarization insensitive 4×4 optical switch. The polarization dependent loss was reduced to 1.1 dB and the polarization dependent crosstalk was less than −17 dB.

Original languageEnglish
JournalIEICE Electronics Express
Volume14
Issue number10
DOIs
Publication statusPublished - 2017 Mar 24

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Keywords

  • Optical switch
  • Polarization diversity circuit
  • Silicon photonics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Sugiyama, K., Chiba, T., Tanizawa, K., Suzuki, K., Kawashima, T., Kawakami, S., Ikeda, K., Kawashima, H., Takahashi, H., & Tsuda, H. (2017). Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch. IEICE Electronics Express, 14(10). https://doi.org/10.1587/elex.14.20170252