Waveguide grating device and method of controlling Bragg wavelength of waveguide grating
First Claim
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1. A waveguide grating device comprising:
- an optical waveguide on a substrate;
a waveguide grating in a portion of the optical waveguide;
a casing in which said optical waveguide is disposed;
substrate support bodies contacting and slidably supporting a first side of said substrate, on opposite sides of the waveguide grating, in said casing; and
substrate pressing means mounted in said casing and making contact with a second side of said substrate, opposite the first side of said substrate, and movable in a direction perpendicular to said substrate.
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Abstract
A waveguide grating device controlling Bragg wavelength after manufacture of the device includes an optical waveguide on a substrate. A variable stress is applied to a waveguide grating in part of the waveguide to bend at least the portion of the substrate including the waveguide grating, changing the Bragg wavelength.
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Citations
18 Claims
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1. A waveguide grating device comprising:
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an optical waveguide on a substrate;
a waveguide grating in a portion of the optical waveguide;
a casing in which said optical waveguide is disposed;
substrate support bodies contacting and slidably supporting a first side of said substrate, on opposite sides of the waveguide grating, in said casing; and
substrate pressing means mounted in said casing and making contact with a second side of said substrate, opposite the first side of said substrate, and movable in a direction perpendicular to said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A waveguide grating device comprising:
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a substrate having a waveguide grating with a Bragg wavelength;
an optical waveguide connected to the waveguide grating;
a casing;
substrate support bodies contacting and slidably supporting said substrate in said casing on a first principal plane of said substrate; and
substrate pressing means mounted in said casing, in contact with a second principal plane of said substrate, opposite the first principal plane, and movable in a direction perpendicular to said substrate or fixed, at least one of said substrate support bodies and said substrate pressing means having a thermal expansion coefficient canceling a change in Bragg wavelength of said waveguide grating caused by a change in temperature. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification