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Apparatus, systems, and methods for on-chip spectroscopy using optical switches

  • US 10,386,237 B2
  • Filed: 05/22/2018
  • Issued: 08/20/2019
  • Est. Priority Date: 02/10/2016
  • Status: Active Grant
First Claim
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1. A spectrometer, comprising:

  • a beam splitter to split incident light into a first portion and a second portion;

    a first interference arm, in optical communication with the beam splitter, to receive the first portion of the incident light, the first interference arm comprising;

    a first optical switch switchable between a first state and a second state;

    a first waveguide having a first optical path length L1 to receive the first portion of the incident light when the first optical switch is in the first state; and

    a second waveguide having a second optical path length L2, different than the first optical path length L1, to receive the first portion of the incident light when the first optical switch is in the second state;

    a second interference arm, in optical communication with the beam splitter, to receive the second portion of the incident light; and

    a single-element detector, in optical communication with the first interference arm and the second interference arm, to detect interference of the first portion of the incident light from the first interference arm and the second portion of the incident light from the second interference arm.

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