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

Eiichi Ishida | Zendy; Kengo Miura | Zendy; Yuya Shoji | Zendy; Hideki Yokoi | Zendy; Tetsuya Mizumoto | Zendy; Nobuhiko Nishiyama | Zendy; Shigehisa Arai | Zendy

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

Author(s) -

Eiichi Ishida,

Kengo Miura,

Yuya Shoji,

Hideki Yokoi,

Tetsuya Mizumoto,

Nobuhiko Nishiyama,

Shigehisa Arai

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.000452

Subject(s) - optical isolator , materials science , isolator , optics , phase shift module , waveguide , interferometry , amorphous solid , optoelectronics , substrate (aquarium) , phase (matter) , insertion loss , optical fiber , physics , electrical engineering , chemistry , organic chemistry , oceanography , quantum mechanics , geology , engineering

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.

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