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Method for aligning electro-optic device with optical fiber array with optical grating couplers

  • US 9,529,165 B1
  • Filed: 06/30/2015
  • Issued: 12/27/2016
  • Est. Priority Date: 06/30/2015
  • Status: Active Grant
First Claim
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1. A method for aligning an electro-optic device comprising a photonic chip having a plurality of optical grating couplers at a surface of the photonic chip, and an optical fiber array comprising a plurality of optical fibers and a body retaining proximal ends of the plurality of optical fibers in side-by-side relation, the method comprising:

  • initially positioning the optical fiber array adjacent the plurality of optical grating couplers;

    actively aligning the optical fiber array relative to the plurality of optical grating couplers in a yaw direction and a roll direction to determine a yaw and roll alignment at a first operating wavelength;

    after determining the yaw and roll alignment at the first operating wavelength, actively aligning the optical fiber array relative to the plurality of optical grating couplers in an x direction and a y direction to determine a first x and y alignment at the first operating wavelength;

    determining a second operating wavelength by determining a peak power transmission value and associated peak power wavelength while performing a spectral sweep, the associated peak power wavelength defining the second operating wavelength; and

    actively aligning the optical fiber array again relative to the plurality of optical grating couplers in the x direction and y direction to determine a second x and y alignment at the second operating wavelength.

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