Fiber to chip coupler
First Claim
1. An apparatus for optically coupling light between an optical fiber and a substrate, comprising:
- a waveguide grating coupler disposed on the substrate andan optical fiber comprising;
a core and a cladding, with an angled tip,where the angled tip of the fiber;
is positioned on the surface of a substrate with the core of the fiber substantially parallel to the surface of the substrate, and the cladding on the longer side of the angled tip is adjacent to the surface of the substrate, andhas a reflective surface with an angle of less than 45 degrees to the surface of the substrate, and the reflective surface is positioned adjacent to the waveguide grating coupler disposed on the substrate.
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Accused Products
Abstract
A fiber to chip coupling connecting an optical fiber to an integrated circuit. A section of fiber is laid on top of the surface of the chip, where the end of the fiber has been cut at an angle to form an angled tip. The angled tip has a flat surface which reflects light down to a waveguide grating coupler disposed on the integrated circuit. Light is reflected off the reflective surface of the angled tip by total internal reflection. The waveguide grating coupler is designed to accept the slightly diverging light beam from the reflective surface of the angled tip of the fiber. Light can also propagate through the fiber to chip coupler in the opposite direction, up from the substrate through the waveguide grating and into an optical fiber after bouncing off the reflective surface of the angled tip.
132 Citations
39 Claims
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1. An apparatus for optically coupling light between an optical fiber and a substrate, comprising:
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a waveguide grating coupler disposed on the substrate and an optical fiber comprising;
a core and a cladding, with an angled tip,where the angled tip of the fiber; is positioned on the surface of a substrate with the core of the fiber substantially parallel to the surface of the substrate, and the cladding on the longer side of the angled tip is adjacent to the surface of the substrate, and has a reflective surface with an angle of less than 45 degrees to the surface of the substrate, and the reflective surface is positioned adjacent to the waveguide grating coupler disposed on the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of fabricating an apparatus for coupling light between an optical fiber and a waveguide grating coupler disposed on a substrate, comprising:
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forming an angled tip with a reflective surface on the fiber by cutting the fiber at an angle of less than 45 degrees with respect to the core of the fiber, positioning the longer side of the angled tip of the fiber on top and adjacent to the waveguide grating coupler, and bonding the angled tip of the fiber to the substrate. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification