Wavelength variable optical filter
AssigneeNTT, Inc.
InventorsYurina Tanaka, Yuichi Akage, Masahiro Ueno, Takashi Sakamoto, Sohan Kawamura, Soichi Oka
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Abstract
A first component having a plate shape includes a first incident surface and a first emission surface disposed on the opposite side of the first incident surface. The first component is made of light transmissive material having an electrostrictive effect. The first component further includes a first transparent electrode formed on the first incident surface, and a second transparent electrode formed between the first emission surface and a first reflective film.
Claims18
A wavelength variable optical filter comprising:
- a first plate-like component made of a light transmissive material which has an electrostrictive effect, the first plate-like component including a first incident surface on a first side of the first plate-like component and a first emission surface on a second side of the first plate-like component, the first side of the first plate-like component being opposite to the second side of the first plate-like component;
- a second plate-like component made of a light transmissive material, the second plate-like component including a second incident surface on a first side of the second plate-like component and a second emission surface on a second side of the second plate-like component, the first side of the second plate-like component being opposite to the second side of the second plate-like component;
- a first reflective film on a side of the first emission surface and configured to partially reflect light transmitting through the first plate-like component;
- a first transparent electrode on the first incident surface;
- a second transparent electrode between the first emission surface and the first reflective film;
- and
- a second reflective film on the second incident surface and configured to partially reflect light transmitting through the second plate-like component, wherein the first reflective film and the second reflective film provide a Fabry-Perot interferometer.
A method of making a wavelength variable optical filter, the method comprising:
- providing a first plate-like component made of a light transmissive material which has an electrostrictive effect, the first plate-like component including a first incident surface on a first side of the first plate-like component and a first emission surface on a second side of the first plate-like component, the first side of the first plate-like component being opposite to the second side of the first plate-like component;
- providing a second plate-like component made of a light transmissive material, the second plate-like component including a second incident surface on a first side of the second plate-like component and a second emission surface on a second side of the second plate-like component, the first side of the second plate-like component being opposite to the second side of the second plate-like component;
- forming a first reflective film on a side of the first emission surface, the first reflective film being configured to partially reflect light transmitting through the first plate-like component;
- forming a first transparent electrode on the first incident surface;
- forming a second transparent electrode between the first emission surface and the first reflective film;
- and
- forming a second reflective film on the second incident surface, the second reflective film being configured to partially reflect light transmitting through the second plate-like component, wherein the first reflective film and the second reflective film make a Fabry-Perot interferometer.
Dependencies are inferred from the claim text.