Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift

Eiichi Ishida, Kengo Miura, Yuya Shoji, Hideki Yokoi, Tetsuya Mizumoto, Nobuhiko Nishiyama, Shigehisa Arai

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We fabricated a magneto-optical (MO) isolator with a TE mode nonreciprocal phase shift. The isolator is based on a Mach-Zehnder interferometer composed of 3-dB directional couplers, a reciprocal phase shifter, and a nonreciprocal phase shifter. To realize TE mode operation in the optical isolator, we designed a novel waveguide structure composed of a hydrogenated amorphous silicon waveguide with an asymmetric MO garnet lateral clad on a garnet substrate. The isolator operation is successfully demonstrated in a fabricated device showing the different transmittances between forward and backward directions. The maximum isolation of the fabricated isolator is 17.9 dB at a wavelength of 1561 nm for the TE mode.

Original languageEnglish
Pages (from-to)452-462
Number of pages11
JournalOptics Express
Volume25
Issue number1
DOIs
Publication statusPublished - 2017 Jan 9

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isolators
garnets
phase shift
waveguides
directional couplers
Mach-Zehnder interferometers
amorphous silicon
isolation
transmittance
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift. / Ishida, Eiichi; Miura, Kengo; Shoji, Yuya; Yokoi, Hideki; Mizumoto, Tetsuya; Nishiyama, Nobuhiko; Arai, Shigehisa.

In: Optics Express, Vol. 25, No. 1, 09.01.2017, p. 452-462.

Research output: Contribution to journalArticle

Ishida, E, Miura, K, Shoji, Y, Yokoi, H, Mizumoto, T, Nishiyama, N & Arai, S 2017, 'Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift', Optics Express, vol. 25, no. 1, pp. 452-462. https://doi.org/10.1364/OE.25.000452
Ishida, Eiichi ; Miura, Kengo ; Shoji, Yuya ; Yokoi, Hideki ; Mizumoto, Tetsuya ; Nishiyama, Nobuhiko ; Arai, Shigehisa. / Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift. In: Optics Express. 2017 ; Vol. 25, No. 1. pp. 452-462.
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