Reconfigurable optical add/drop multiplexer (R-OADM) based on silicon photonic crystal slab waveguides

Tao Chu, Hirohito Yamada, Akiko Gomyo, Jun Ushida, Satomi Ishida, Yasuhiko Arakawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Reconfigurable optical add/drop multiplexers (R-OADMs) are indispensable devices in wavelength division multiplexing (WDM) network systems, since they can be used for dynamically wavelength routing and for replacing any failed OADM unit. Here, we propose a photonic integrated R-OADM device based on silicon photonic crystal (PhC) slab waveguides, which is controlled through thermo-optic effect. The R-OADM device was composed of a tunable wavelength multiplexer/demultiplexer and a 2×2 optical switch, which were both formed with Mach-Zehnder interferometers (MZIs). The device was compact with a net footprint of 500 μm × 140 μm, excluding its electrode pads. The dropping central wavelength of the R-OADM can be tuned through thermo-optic effect, and the output port of the drop signal can be selected between the THROUGH and DROP ports with the 2×2 optical switch. A maximum 10.8 nm dropping wavelength tuning was obtained with a heating power of 0.9 W. The 3-dB channel-dropping bandwidth was 5 nm and the extinction ratio at the dropping wavelength for the port THROUGH was as high as 40 dB. The tuning response speed was about 100 μsec.

Original languageEnglish
Title of host publicationOptomechatronic Micro/Nano Devices and Components II
Publication statusPublished - 2006 Dec 1
EventOptomechatronic Micro/Nano Devices and Components II - Boston, MA, United States
Duration: 2006 Oct 32006 Oct 4

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptomechatronic Micro/Nano Devices and Components II
Country/TerritoryUnited States
CityBoston, MA


  • Integrated optics
  • Line-defect waveguide
  • Mach-zehnder interferometer
  • Photonic crystal
  • Reconfigurable optical add/drop multiplexer (R-OADM)
  • Silicon photonics
  • Thermo-optic effects
  • Wavelength-division multiplexing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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