Multimode interference photonic switches (MIPS)

Shuichi Nagai, Goh Morishima, Hirokazu Inayoshi, Katsuyuki Utaka*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)


The switching characteristics of multimode interference photonic switches (MIPS) are analyzed by wide-angle finite difference beam propagation method (FD-BPM). A result, it is found that the MIPS with a multimode interference (MIMI) length of 599 μm can switch the output light polarization insensitively with a crosstalk of less than -20 dB for a wavelength range of 70 nm. These analyses show that the MIPS can also have a 3-dB coupler function. Experimentally, an InGaAsP/InP 1 × 2 MIPS with a thicker InP cladding layer was fabricated and exhibited switching operation with crosstalks of -8 dB and -10 dB at 0 and 20 mA current injections, respectively. For a 2 × 2 MIPS with a thinner InP cladding layer, better switching characteristics with a crosstalk of -13 dB and an extinction ratio of 17 dB were realized.

Original languageEnglish
Pages (from-to)675-681
Number of pages7
JournalJournal of Lightwave Technology
Issue number4
Publication statusPublished - 2002 Apr


  • Crosstalk
  • InGaAsP
  • Multimode interference (MMI)
  • Photonic switch
  • Semiconductor waveguide device
  • Wide-angle finite difference beam propagation method (FD-BPM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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