Crystal-core fiber mode converter for low-loss polarization-insensitive planar lightwave circuits
AssigneeIntel Corporation
InventorsAchintya K. Bhowmik, Nagesh K. Vodrahalli
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Abstract
A planar lightwave circuit comprises a first portion of a waveguide, a second portion of a waveguide, and a segment of crystal core fiber coupling the first portion to the second portion of the waveguide. The crystal core fiber helps to reduce the polarization sensitivity of the waveguide. In one embodiment, multiple crystal core fibers are used in a planar lightwave circuit having multiple waveguides, such as an array waveguide grating.
Claims22
A planar lightwave circuit comprising:
- a first portion of a waveguide;
- a second portion of waveguide;
- and
- a segment of crystal core fiber coupling the first portion of the waveguide with the second portion of the waveguide.
An array waveguide grating comprising:
- a plurality of waveguides;
- a V-groove portion of substrate having multiple segments of crystal core fibers inserted into a section of the plurality of waveguides.
A method of correcting for birefringence in a planar lightwave circuit, the method comprising:
- removing a section of the planar lightwave circuit;
- and
- inserting a portion of crystal core fiber into the planar lightwave circuit.
A method of correcting for birefringence in a planar waveguide, the method comprising:
- directing an optical signal down a first segment of the planar waveguide;
- changing a polarization of the optical signal by directing the optical signal through a portion of crystal core fiber;
- and
- directing the optical signal down a second segment of the planar waveguide.
Dependencies are inferred from the claim text.