Photonic chip grating couplers
First Claim
1. A coupling apparatus for coupling light from a source to a chip, comprising:
- a beam splitter having an input port, a first output port and a second output port, the beam splitter configured to receive an incident beam of light at the input port and output a first beam of light with substantially transverse-magnetic (TM) polarization from the first output port and output a second beam of light with substantially transverse-electric (TE) polarization from the second output port;
a first grating coupler formed on the chip, including a first horn section, the first horn section including a first grating with a first plurality of arc-shaped grating lines; and
a first reflector positioned to reflect the first beam of light onto the first grating coupler such that a first plane of incidence of the first beam of light is substantially normal to the axis of the first horn section, the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first grating at an angle with respect to a normal to the plane of the first grating coupler.
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Accused Products
Abstract
This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. An optical coupler can be utilized for coupling external optical fibers or sources with the optical components. The optical coupler can include a beam splitter for splitting an incident light having both trans-electric (TE) and trans-magnetic (TM) polarizations into two beams having only TE and TM polarizations. The light beam with TM polarization is incident on a grating coupler on the chip having a horn section, which includes gratings. The light beam is reflected onto the grating coupler such that the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first plurality of gratings at an angle with respect to a normal to the plane of the first grating coupler.
23 Citations
8 Claims
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1. A coupling apparatus for coupling light from a source to a chip, comprising:
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a beam splitter having an input port, a first output port and a second output port, the beam splitter configured to receive an incident beam of light at the input port and output a first beam of light with substantially transverse-magnetic (TM) polarization from the first output port and output a second beam of light with substantially transverse-electric (TE) polarization from the second output port; a first grating coupler formed on the chip, including a first horn section, the first horn section including a first grating with a first plurality of arc-shaped grating lines; and a first reflector positioned to reflect the first beam of light onto the first grating coupler such that a first plane of incidence of the first beam of light is substantially normal to the axis of the first horn section, the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first grating at an angle with respect to a normal to the plane of the first grating coupler. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification