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US 12,663,667 B2Granted
Wavelength tunable device
AssigneeNTT, Inc.
InventorsYurina Tanaka, Yuichi Akage, Takashi Sakamoto, Soichi Oka
Life of this patent
Estimating the term…
Abstract
A temperature regulating unit is attached to a first incident surface of a first component through a first transparent electrode. The temperature regulating unit is composed of a Peltier element. The temperature regulating unit includes an opening through which the target light can pass. The temperature regulating unit has, for example, a rectangular parallelepiped outer shape in which a surface perpendicular to an optical axis is square-shaped. The opening is formed to penetrate through the temperature regulating unit in a direction perpendicular to the optical axis and has a circular shape in a plan view.
Claims18
A wavelength tunable device comprising:
- a first component having a plate-like shape, and being made of material that has an electrostrictive effect and configured to allow light to pass through, the first component including a first incident surface and a first emission surface on an opposite side of the first component to the first incident surface, and the first incident surface and the first emission surface being arranged on an optical axis;
- a second component having a plate-like shape, and being made of material that is configured to allow the light to pass through, the second component including a second incident surface and a second emission surface on an opposite side of the second component to the second incident surface, the second incident surface and the second emission surface being arranged on the optical axis, and a distance between the first incident surface and the second incident surface on the optical axis being constant between the first component and the second component;
- a first reflective film on the first emission surface and configured to partially reflect the light;
- a first transparent electrode on the first incident surface;
- a second transparent electrode between the first emission surface and the first reflective film;
- a second reflective film on the second incident surface and configured to partially reflect the light;
- and
- a temperature regulator including a Peltier element, the temperature regulator being attached to the first incident surface via the first transparent electrode, wherein:
- the first emission surface and the second incident surface are arranged in parallel to face each other,
- a distance between the first transparent electrode and the second transparent electrode is smaller than a beam diameter of the light,
- the first reflective film and the second reflective film constitute a Fabry-Perot interferometer, and
- the temperature regulator includes an opening that is configured to allow the light to pass through.
9 more elements
A wavelength tunable device comprising:
- a first component having a plate-like shape, and being made of a material that has an electrostrictive effect and configured to allow light to pass through, the first component including a first incident surface and a first emission surface on an opposite side of the first component to the first incident surface, and the first incident surface and the first emission surface being arranged on an optical axis;
- a second component having a plate-like shape, and being made of material that is configured to allow the light to pass through, the second component including a second incident surface and a second emission surface on an opposite side of the second component to the second incident surface, the second incident surface and the second emission surface being arranged on the optical axis, and a distance between the first incident surface and the second incident surface on the optical axis being constant between the first component and the second component;
- a first reflective film on the first emission surface, the first reflective film being configured to partially reflect the light;
- a first transparent electrode on the first incident surface;
- a second transparent electrode between the first emission surface and the first reflective film;
- a second reflective film on the second incident surface, the second reflective film being configured to partially reflect the light;
- and
- a first temperature regulator including a Peltier element and being attached to the first incident surface via the first transparent electrode, wherein
- the first emission surface and the second incident surface are arranged in parallel to face each other,
- the first reflective film and the second reflective film constitute a Fabry-Perot interferometer, and
- the first temperature regulator includes an opening configured to allow the light to pass through.
8 more elements
Dependencies are inferred from the claim text.