Temperature-insensitive design of waveguide isolator employing nonreciprocal guided-radiation mode conversion

Salinee Choowitsakunlert, Takuya Kobashigawa, Nariaki Hosoya, Rardchawadee Silapunt, Hideki Yokoi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The temperature dependence of the optical isolator employing a nonreciprocal guided-radiation mode conversion is investigated. The optical isolator consists of a rib-type magnetooptic waveguide with an amorphous Si (a-Si:H) guiding layer. The nonreciprocal phase shift in the optical isolator is calculated at a wavelength of 1.55 μm. The relationship of rib height and rib width for the isolator operation is clarified for various operating temperatures. Refractive indices of layers in the magnetooptic waveguide are considered since proper refractive indices can circumvent waveguide parameter deviation due to the temperature shift. The results show that athermal operation can be achieved by the negative temperature dependence of the refractive index of the upper cladding layer, and the relationship of waveguide parameters varies only slightly with the selected upper cladding layer.

Original languageEnglish
Article number112201
JournalJapanese Journal of Applied Physics
Issue number11
Publication statusPublished - 2018 Nov

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


Dive into the research topics of 'Temperature-insensitive design of waveguide isolator employing nonreciprocal guided-radiation mode conversion'. Together they form a unique fingerprint.

Cite this