Optical coupling arrangement
First Claim
1. An optical coupling arrangement, comprising:
- a lightwave circuit;
a coupling element; and
an optical waveguide element;
wherein the lightwave circuit has a first surface area;
wherein the coupling element is attached to the first surface area such that an optical signal can be transmitted from the lightwave circuit to the coupling element;
wherein the optical waveguide element is attached to the coupling element at a first junction zone such that the optical signal can be transmitted from the coupling element to the optical waveguide element;
wherein the coupling element is configured to perform mode transformation for the optical signal transmitted from the lightwave circuit to the optical waveguide element such that adiabatic coupling of the optical signal to the optical waveguide element is enabled;
wherein the coupling element is a glass block used as a mode converter between the lightwave circuit and the optical waveguide element.
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Accused Products
Abstract
An optical coupling arrangement is provided, comprising a lightwave circuit (LC), a coupling element and an optical waveguide element, wherein the lightwave circuit has a first surface area and wherein the coupling element is attached to the first surface area) such that an optical signal can be transmitted from the lightwave circuit to the coupling element. The optical waveguide element is attached to the coupling element at a first junction zone such that the optical signal can be transmitted from the coupling element to the optical waveguide element). The coupling element is configured to perform mode transformation to the optical signal transmitted from the lightwave circuit to the optical waveguide element and such that adiabatic coupling of the optical signal to the optical waveguide element is enabled. Thus, a better coupling efficiency can be achieved.
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Citations
15 Claims
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1. An optical coupling arrangement, comprising:
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a lightwave circuit; a coupling element; and an optical waveguide element; wherein the lightwave circuit has a first surface area; wherein the coupling element is attached to the first surface area such that an optical signal can be transmitted from the lightwave circuit to the coupling element; wherein the optical waveguide element is attached to the coupling element at a first junction zone such that the optical signal can be transmitted from the coupling element to the optical waveguide element; wherein the coupling element is configured to perform mode transformation for the optical signal transmitted from the lightwave circuit to the optical waveguide element such that adiabatic coupling of the optical signal to the optical waveguide element is enabled; wherein the coupling element is a glass block used as a mode converter between the lightwave circuit and the optical waveguide element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical coupling arrangement, comprising:
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a lightwave circuit; a coupling element; and an optical waveguide element; wherein the lightwave circuit has a first surface area; wherein the coupling element is attached to the first surface area such that an optical signal can be transmitted from the lightwave circuit to the coupling element; wherein the optical waveguide element is attached to the coupling element at a first junction zone such that the optical signal can be transmitted from the coupling element to the optical waveguide element; wherein the coupling element is configured to perform mode transformation for the optical signal transmitted from the lightwave circuit to the optical waveguide element such that adiabatic coupling of the optical signal to the optical waveguide element is enabled; wherein an optical waveguide is arranged at the first surface area of the lightwave circuit and the coupling element and a coupling region are configured to transmit an optical signal to the optical waveguide; wherein the optical waveguide comprises a core, an upper cladding and a lower cladding; wherein a refractive index of the upper cladding is lower than a refractive index of an optical path in the coupling element; wherein the optical waveguide at least partially extends along a bottom surface area of the coupling element; wherein a first recess is formed in the first surface area of the lightwave circuit and a first filler material is inserted in the first recess; wherein a refractive index of the first filler material is lower than a refractive index of the upper cladding and/or the lower cladding; wherein the first filler material at least partially extends along a bottom surface area of the coupling element.
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Specification