Apparatus and methods for quantum beam tracking
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United States of America Patent
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Sep 21, 2021
Grant Date -
Feb 4, 2021
app pub date -
Jul 7, 2020
filing date -
Aug 2, 2019
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Abstract
A method includes sending a probe beam into a beam path that induces a lateral displacement to the probe beam. The probe beam includes a plurality of orthogonal spatial modes that are entangled with each other. The method also includes measuring a phase of each spatial mode from the plurality of orthogonal spatial modes in the probe beam at a detector disposed within a near field propagation regime of the probe beam. The method also includes estimating the lateral displacement of the probe beam based on a phase of each spatial mode from the plurality of spatial modes in the probe beam after the beam path.
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