PHASE CONTROL FOR DOUBLE-NESTED QUADRATURE MODULATOR
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Issued Date -
Jun 13, 2024
app pub date -
Mar 7, 2023
filing date -
Dec 12, 2022
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Abstract
In some implementations, a controller may apply a set of phase dithers to a first inner Mach-Zehnder (MZ) interferometer and a second inner MZ interferometer, the first inner MZ interferometer and the second inner MZ interferometer being included in an outer MZ interferometer, the set of phase dithers including a first in-phase dither state and a second in-phase dither state and including a first anti-phase dither state and a second anti-phase dither state. The controller may determine an initial error term based at least in part on the set of phase dithers. The controller may adjust, based on the initial error term, the outer MZ interferometer to a target phase associated with a target error term, wherein respective branches of at least one of the first MZ interferometer or the second MZ interferometer are adjusted differentially.
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