Investigation of nonreciprocal characteristics and design of interferometric optical isolator with multimode interference coupler operating with a unidirectional magnetic field

Jeong Su Yang, Yuya Shoji, Hideki Yokoi, Masaki Ono, Tetsuya Mizumoto

Research output: Contribution to journalArticle

3 Citations (Scopus)


A novel interferometric isolator that consists of multimode interference (MMI) couplers and operates under a unidirectional magnetic field has been proposed and designed to fabricate a high-performance waveguide magnetooptic isolator operating at a wavelength of 1.55 μm. The optical isolator has an upper HfO2 cladding layer in one arm of the interferometer, and the other arm is covered with a SiO2 cladding layer. By virtue of this configuration, the isolator operates under a unidirectional magnetic field. The optimized structure of the isolator was determined by a 3D beam propagation method.

Original languageEnglish
Pages (from-to)7045-7049
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number10
Publication statusPublished - 2004 Oct
Externally publishedYes



  • Garnet
  • Multimode interference coupler
  • Nonreciprocal phase shift
  • Optical isolator

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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