Method for aligning electro-optic device with optical fiber array with optical grating couplers
First Claim
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 single mode optical fibers and a body retaining proximal ends of the plurality of single mode 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, the actively aligning comprising coupling a plurality of photodiodes respectively to proximal ends of the plurality of single mode optical fibers, and determining an optimum a yaw and roll position based upon each single mode optical fiber having a same threshold power;
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 based upon a spectral sweep, the peak power wavelength defining the second operation 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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Abstract
A method is for aligning an electro-optic device. The method may include initially positioning an optical fiber array adjacent to optical grating couplers, and actively aligning the optical fiber array relative to the optical grating couplers in a yaw direction and a roll direction to determine a yaw and roll alignment at a first operating wavelength. The method may include actively aligning the optical fiber array relative to 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, and actively aligning the optical fiber array again relative to the optical grating couplers in the x direction and y direction to determine a second x and y alignment at the second operating wavelength.
23 Citations
22 Claims
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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 single mode optical fibers and a body retaining proximal ends of the plurality of single mode 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, the actively aligning comprising coupling a plurality of photodiodes respectively to proximal ends of the plurality of single mode optical fibers, and determining an optimum a yaw and roll position based upon each single mode optical fiber having a same threshold power;
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 based upon a spectral sweep, the peak power wavelength defining the second operation 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- initially positioning the optical fiber array adjacent the plurality of optical grating couplers;
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10. 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 single mode optical fibers and a body retaining proximal ends of the plurality of optical fibers in side-by-side relation, the method comprising:
- 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, the actively aligning comprising coupling a plurality of photodiodes respectively to proximal ends of the plurality of single mode optical fibers, and determining a desired yaw and roll position based upon each optical fiber having a same threshold power;
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 based upon a spectral sweep, the peak power wavelength defining the second operation 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- 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, the actively aligning comprising coupling a plurality of photodiodes respectively to proximal ends of the plurality of single mode optical fibers, and determining a desired yaw and roll position based upon each optical fiber having a same threshold power;
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19. 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 single mode optical fibers and a body retaining proximal ends of the plurality of optical fibers in side-by-side relation, the method comprising:
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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, the actively aligning comprising coupling a plurality of photodiodes respectively to proximal ends of the plurality of single mode optical fibers, and determining a desired yaw and roll position based upon each optical fiber having a same threshold power; 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 based upon a spectral sweep, the peak power wavelength defining the second operation wavelength; 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; and geometrically aligning the optical fiber array in a pitch direction. - View Dependent Claims (20, 21, 22)
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Specification