4 ×4 InAlGaAs/InAlAs optical-switch fabric by cascading mach-zehnder interferometer-type optical switches with low-power and low-polarization- dependent operation

Yuta Ueda, Noriaki Koyama, Kazuki Kambayashi, Shinji Fujimoto, Katsuyuki Utaka, Takashi Shiota, Takeshi Kitatani

Research output: Contribution to journalArticle

10 Citations (Scopus)


High-speed optical switches are essential devices to construct next-generation optical networks. We have studied 2 × 2 InAlGaAs/InAlAs hybrid-waveguide-type Mach-Zehnder interferometer-type optical switches and demonstrated low-polarization-dependent switching operation with crosstalks of less than -20 dB, injection currents of about 5 mA, and response times of about 3 ns. In this letter, our conventional 2 × 2 optical switch was extended to a 4 × 4 optical-switch fabric by a cascading approach. As a result, fundamental switching operation was confirmed with low power consumption and low polarization dependence.

Original languageEnglish
Article number6151035
Pages (from-to)757-759
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
Publication statusPublished - 2012 Apr 26



  • Cascade connection
  • InAlGaAs/InAlAs compound semiconductor
  • Mach-Zehnder (MZ) interferometer photonic switch
  • multimode-interference (MMI) coupler
  • polarization independence

ASJC Scopus subject areas

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

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