OPTICAL MODULE AND METHOD FOR PRODUCING SAME
First Claim
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1. An optical module comprising:
- a substrate-type optical waveguide device; and
an optical fiber that guides light that enters or exits the substrate-type optical waveguide device whereinspot sizes w1 and w2 satisfy 1<
w2/w1<
α
,wherew1 is a spot size;
on an end surface of the substrate-type optical waveguide device, andof a waveguide mode guided through a core of the substrate-type optical waveguide device,w2 is a spot size;
on an end surface of the optical fiber, andof a waveguide mode guided through a core of the optical fiber, andα
is a spot size ratio w2/w1 at which an efficiency η
(0) is equal to the efficiency η
(0) when w2/w1=1, where the efficiency η
(0) is an efficiency of coupling between the substrate-type optical waveguide device and the optical fiber when an amount of axis misalignment between the core of the substrate-type optical waveguide device and the core of the optical fiber is 0.
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Abstract
An optical module includes: a substrate-type optical waveguide device; and an optical fiber that guides light that enters or exits the waveguide device. Spot sizes w1 and w2 satisfy 1<w2/w1<α; w1 is a spot size: on an end surface of the substrate-type optical waveguide device, and of a waveguide mode guided through a core of the substrate-type optical waveguide device, w2 is a spot size: on an end surface of the optical fiber, and of a waveguide mode guided through a core of the optical fiber, and a is a spot size ratio w2/w1 at which an efficiency η(0) is equal to the efficiency η(0) when w2/w1=1.
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Citations
13 Claims
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1. An optical module comprising:
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a substrate-type optical waveguide device; and an optical fiber that guides light that enters or exits the substrate-type optical waveguide device wherein spot sizes w1 and w2 satisfy 1<
w2/w1<
α
,where w1 is a spot size; on an end surface of the substrate-type optical waveguide device, and of a waveguide mode guided through a core of the substrate-type optical waveguide device, w2 is a spot size; on an end surface of the optical fiber, and of a waveguide mode guided through a core of the optical fiber, and α
is a spot size ratio w2/w1 at which an efficiency η
(0) is equal to the efficiency η
(0) when w2/w1=1, where the efficiency η
(0) is an efficiency of coupling between the substrate-type optical waveguide device and the optical fiber when an amount of axis misalignment between the core of the substrate-type optical waveguide device and the core of the optical fiber is 0. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for producing an optical module that comprises a substrate-type optical waveguide device and an optical fiber that guides light that enters or exits the substrate-type optical waveguide device, the method comprising:
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setting spot sizes w1 and w2 to satisfy 1<
w2/w1<
α
,where w1 is a spot size; on an end surface of the substrate-type optical waveguide device, and of a waveguide mode guided through a core of the substrate-type optical waveguide device, w2 is a spot size; on an end surface of the optical fiber, and of a waveguide mode guided through a core of the optical fiber, and α
is a spot size ratio w2/w1 at which an efficiency η
(0) is equal to the efficiency η
(0) when w2/w1=1, where the efficiency η
(0) is an efficiency of coupling between the substrate-type optical waveguide device and the optical fiber when an amount of axis misalignment between the core of the substrate-type optical waveguide device and the core of the optical fiber is 0. - View Dependent Claims (13)
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Specification