Optical functional device and optical integrated device
First Claim
1. An optical functional device comprising:
- a periodic structure with a first refractive index portion and a plurality of second refractive index portions, wherein the second refractive index portions recur in a periodic pattern relative to the first refractive index portion, and wherein each recurrence of the second refractive index portion has a variable refractive index, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic.
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Accused Products
Abstract
On a waveguide 34 formed on a substrate 33, a plurality of comblike shaped electrodes 37, 38 that generate surface acoustic waves 37a, 38a from different directions are provided. And a periodic refractive indices portion 40 is formed, where the refractive indices are periodically distributed in accordance with the wavelengths of the surface acoustic waves 37a, 38a generated by applying a voltage to the comblike shaped electrodes 37, 38. And by changing a frequency of the applying voltage for sequentially changing the wavelengths of the surface acoustic waves 37a, 38a, the exiting direction of the light exiting from the periodic refractive indices portion 40 is scanned. This makes it possible to provide an optical functional device and an optical scanning apparatus that perform light scanning less costly but at a high speed, and that can secure a wide scanning angle.
43 Citations
30 Claims
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1. An optical functional device comprising:
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a periodic structure with a first refractive index portion and a plurality of second refractive index portions, wherein the second refractive index portions recur in a periodic pattern relative to the first refractive index portion, and wherein each recurrence of the second refractive index portion has a variable refractive index, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic. - View Dependent Claims (2, 3, 4, 5, 21, 22)
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6. An optical integrated device comprising:
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a waveguide portion for guiding light; and
a periodic structure portion to which light is directed by the waveguide portion, and which has a periodic structure with a first refractive index portion and a plurality of second refractive index portions, wherein the second refractive index portions recur in a periodic pattern relative to the first refractive index portion, and wherein each recurrence of the second refractive index portion has a variable refractive index, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic. - View Dependent Claims (7, 8, 23, 24)
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9. An optical integrated device comprising:
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a periodic structure portion which has a periodic structure with a first refractive index portion and a plurality of second refractive index portions, wherein the second refractive index portions recur in a periodic pattern relative to the first refractive index portion, and wherein each recurrence of the second refractive index portion has a variable refractive index, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic; and
a waveguide portion for guiding light. - View Dependent Claims (10, 25, 26)
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11. An optical integrated device comprising:
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a light source portion that can vary wavelengths of emitted light; and
a periodic structure portion which has a periodic structure with a first refractive index portion and a plurality of second refractive index portions, wherein the second refractive index portions recur in a periodic pattern relative to the first refractive index portion, and wherein each recurrence of the second refractive index portion has a variable refractive index, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic. - View Dependent Claims (12, 13, 14, 15, 27, 28)
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16. An optical functional device comprising:
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a periodic structure having a first refractive index portion and a plurality of second refractive index portions, the second refractive index portions recurring in a periodic pattern with respect to the first refractive index portion; and
a controller for varying the refractive index of the plurality of second refractive index portions, and wherein, when the second refractive index portions are in a first refractive state, the optical functional device passes light having a first characteristic and blocks light having a second characteristic, and, when the second refractive index portions are in a second refractive state, the optical functional device passes light having the first characteristic and redirects light having the second characteristic. - View Dependent Claims (17, 18, 19, 20, 29, 30)
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Specification