| 摘要 |
Provided is an optical control device including first and second optical waveguides, a first control signal electrode including a first input-side signal electrode, a second control signal electrode including a second input-side signal electrode, an inter-signal-electrode ground electrode, a first ground electrode, and a second ground electrode. The substrate has a first groove that is provided between the first input-side signal electrode and the inter-signal-electrode ground, a second groove that is provided between the first input-side signal electrode and the first ground electrode, a third groove that is provided between the second input-side signal electrode and the inter-signal-electrode ground electrode, and a fourth groove that is provided between the second input-side signal electrode and the second ground electrode. |
| 主权项 |
1. An optical control device, comprising:
a substrate; first and second optical waveguides provided on the substrate, and extending along a main surface of the substrate; a first control signal electrode provided on the main surface of the substrate so as to change a refractive index of light propagating through the inside of the first optical waveguide on the basis of a first electrical signal supplied from an outer side, the first control signal electrode including a first operating electrode part extending along the first optical waveguide to apply an electrical field to the first optical waveguide, and a first input-side signal electrode extending along the main surface of the substrate to transmit the first electrical signal to the first operating electrode part; a second control signal electrode provided on the main surface of the substrate so as to change a refractive index of light propagating through the inside of the second optical waveguide on the basis of a second electrical signal supplied from an outer side, the second control signal electrode including a second operating electrode part extending along the second optical waveguide to apply an electrical field to the second optical waveguide, and a second input-side signal electrode extending along the main surface of the substrate to transmit the second electrical signal to the second operating electrode part; an inter-signal-electrode ground electrode provided on the main surface of the substrate between the first input-side signal electrode and the second input-side signal electrode, the inter-signal-electrode ground electrode being positioned to be spaced away from the first input-side signal electrode and the second input-side signal electrode in a plan view; a first ground electrode provided on the main surface of the substrate on a side opposite to an inter-signal-electrode ground electrode side with the first input-side signal electrode interposed between the first ground electrode and the inter-signal-electrode ground electrode, the first ground electrode being positioned to be spaced away from the first input-side signal electrode in a plan view; and a second ground electrode provided on the main surface of the substrate on a side opposite to an inter-signal-electrode ground electrode side with the second input-side signal electrode interposed between the second ground electrode and the inter-signal-electrode ground electrode, the second ground electrode being positioned to be spaced away from the second input-side signal electrode in a plan view, wherein, in a plan view, the substrate includes a first groove provided between the first input-side signal electrode and the inter-signal-electrode ground electrode, a second groove provided between the first input-side signal electrode and the first ground electrode, a third groove provided between the second input-side signal electrode and the inter-signal-electrode ground electrode, and a fourth groove provided between the second input-side signal electrode and the second ground electrode. |
