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

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

研究成果: Article査読

1 被引用数 (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.

ジャーナルJapanese Journal of Applied Physics
出版ステータスPublished - 2018 11月

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)


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