Frequency shifter for heterodyne interferometry measurements and device for heterodyne interferometry measurements having such a frequency shifter
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United States of America
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Jan 28, 2025
Grant Date -
Feb 16, 2023
app pub date -
Dec 11, 2020
filing date -
Dec 11, 2020
priority date (Note) -
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Abstract
The invention refers to a frequency shifter for heterodyne interferometry measurements, comprising a chip, an input waveguide configured to guide a light beam, at least four phase modulators, each being arranged to receive the light beam from the input waveguide and configured to modulate a phase of the light beam, an output combiner being arranged to let the light beams modulated by each phase modulator interfere, a first output waveguide coupled to the output combiner and configured to receive the modulated light beams constructively interfering at the output combiner, a second output waveguide coupled to the output combiner and configured to receive the modulated light beams destructively interfering at the output combiner, wherein the input waveguide, the phase modulators, the output combiner, the first output waveguide and the second output waveguide are arranged on the chip.
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