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US 2004/0001663 A1Published application
Polarization-insensitive planar lightwave circuits and method for fabricating the same
AssigneeIntel Corporation
InventorsNagesh K. Vodrahalli, Achintya K. Bhowmik
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Abstract
A planar lightwave circuit comprises a plurality of waveguides formed with a geometrical or refractive index properties that renders the planar lightwave circuit substantially polarization insensitive.
Claims28
A planar lightwave circuit comprising:
- an input optical path;
- an output optical path;
- and
- a plurality of waveguides coupling the input optical path to the output optical path, the plurality of waveguides having geometrical means or refractive index property means to make the plurality of waveguides substantially polarization insensitive.
1 more element
A planar lightwave circuit comprising:
- an input optical path;
- an output optical path;
- and
- a plurality of waveguides coupling the input optical path to the output optical path, the plurality of waveguides substantially insensitive to polarization based on geometrical dimensions of the plurality of waveguides or refractive index properties of the plurality of waveguides, wherein the plurality of waveguides has no abrupt changes in width.
1 more element
A planar lightwave circuit comprising:
- an input optical path;
- an output optical path;
- and
- a plurality of waveguides coupling the input optical path to the output optical path, the plurality of waveguides substantially insensitive to polarization based on refractive index properties of the plurality of waveguides.
1 more element
A method of correcting for birefringence in a planar lightwave circuit, the method comprising:
- forming a plurality of waveguides, the plurality of waveguides having geometrical means or refractive index property means to make the plurality of waveguides substantially polarization insensitive.
A method of correcting for birefringence in a planar lightwave circuit, the method comprising:
- directing a first optical signal down a first waveguide of the planar lightwave circuit, wherein the first waveguide has a first width;
- directing a second optical signal down a second waveguide of the planar lightwave circuit, wherein the second waveguide has a second width that is different from the first width,
- wherein for each of the first and second waveguides,
- 5 ∫ 0 l i ( n TM - n TE ) ⅆ l i = const ,
- where li is the length of an ith waveguide of the first and second waveguides, and nTM and nTE are refractive indices for polarized light within the first and second waveguides.
2 more elements
A method of correcting for birefringence in a planar lightwave circuit, the method comprising:
- directing a first optical signal down a first waveguide of the planar lightwave circuit, wherein the first waveguide has a first refractive index;
- directing a second optical signal down a second waveguide of the planar lightwave circuit, wherein the second waveguide has a second refractive index that is different from the first refractive index,
- wherein for each of the first and second waveguides,
- 6 ∫ 0 l i ( n TM - n TE ) ⅆ l i = const ,
- where li is the length of an ith waveguide of the first and second waveguides, and nTM and nTE are refractive indices for polarized light within the first and second waveguides.
2 more elements
Dependencies are inferred from the claim text.