Optical circuit and method
AssigneeAdvantest Corporation
InventorKouichiro UEKUSA
Life of this patent
Estimating the term…
Abstract
Provided is an optical circuit comprising: an optical switch that outputs an incident light that is polarized in a first polarization direction to any of a first optical path or a second optical path while keeping a polarization state; a polarization rotation coupling element that is arranged on an output side of each of the first optical path and the second optical path, and converts the incident light that is input from the second optical path into polarized light in a second polarization direction that is orthogonal to the first polarization direction, to output the light from an output port, while outputting, from the output port, the incident light that is input from the first optical path while keeping the polarization state.
Claims20
An optical circuit comprising:
- an optical switch that outputs an incident light that is polarized in a first polarization direction to any of a first optical path or a second optical path while keeping a polarization state;
- and
- a polarization rotation coupling element that is arranged on an output side of each of the first optical path and the second optical path, and converts the incident light that is input from the second optical path into polarized light in a second polarization direction that is orthogonal to the first polarization direction, to output the light from an output port, while outputting, from the output port, the incident light that is input from the first optical path while keeping the polarization state.
A method comprising:
- outputting, by an optical switch, an incident light that is polarized in a first polarization direction to any of a first optical path or a second optical path while keeping a polarization state;
- and
- outputting, when the incident light is input from the first optical path to a polarization rotation coupling element, the incident light from an output port of the polarization rotation coupling element while keeping the polarization state, and converting, when the incident light is input from the second optical path to the polarization rotation coupling element, the incident light into polarized light in a second polarization direction that is orthogonal to the first polarization direction by the polarization rotation coupling element, to output the light from the output port of the polarization rotation coupling element.
Dependencies are inferred from the claim text.