OPTICAL ISOLATOR
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United States of America Patent
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Issued Date -
Aug 4, 2022
app pub date -
May 22, 2020
filing date -
May 24, 2019
priority date (Note) -
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Abstract
An optical isolator on a silicon photonic integrated circuit. The optical isolator comprising: a polarization splitter; a polarization rotator; and a Faraday rotator. The Faraday rotator comprises: one or more magnets providing a magnetic field; and a silicon spiral delay line. The silicon spiral delay line being formed from a silicon waveguide shaped into a spiral region having no built-in phase shifters and a central region within the spiral region. The central region having no more than a total of 180 degree of phase shifters.
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