Optical waveguide device, optical interferometer, and method for producing optical waveguide device
AssigneeNEC Corporation
InventorsKenji Sato, Mineto Satoh
Life of this patent
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Abstract
In order to independently perform control of a phase difference and a loss of light transmitting through an optical waveguide in a simple and easy configuration, an optical waveguide device includes an optical waveguide provided with two electrodes each supplied with a corresponding one of two signals; and a control unit for controlling the two signals so as to cause a phase variation and a loss variation which are caused in light transmitting through the optical waveguide by the two signals to each have a predetermined value.
Claims7
An optical waveguide device comprising:
- an optical waveguide provided with two electrodes each supplied with a corresponding one of two signals;
- a control unit that controls the two signals so as to cause a phase variation and a loss variation of lights transmitting through the optical waveguide to each have a predetermined value by the two signals;
- and
- a monitoring unit that outputs a monitor signal in accordance with an intensity of the lights transmitting through the optical waveguide,
- wherein the control unit controls the two signals on the basis of the monitor signal.
An optical waveguide device comprising:
- a first optical waveguide provided with a first electrode and a second electrode which are supplied with a first signal and a second signal, respectively, each for controlling a phase and a loss of inputted first light;
- a second optical waveguide provided with a fourth electrode and a fifth electrode which are supplied with a fourth signal and a fifth signal, respectively, each for controlling a phase and a loss of inputted second light;
- and
- a control unit that generates the first, second, fourth and fifth signals so as to cause a predetermined relation to arise between:
- a first loss variation caused in light transmitting through the first optical waveguide by the first signal and the second signal and a second loss variation caused in light transmitting through the second optical waveguide by the fourth signal and the fifth signal or
- a first phase variation caused in the light transmitting through the first optical waveguide by the first signal and the second signal and a second phase variation caused in the light transmitting through the second optical waveguide by the fourth signal and the fifth signal.
A control method for an optical waveguide device, comprising:
- performing control so as to cause two signals each applied to a corresponding one of two electrodes included in an optical waveguide to give a predetermined phase variation and a predetermined loss variation to light transmitting through the optical waveguide;
- outputting a monitor signal in accordance with an intensity of the light transmitting through the optical waveguide;
- and
- controlling the two signals on the basis of the monitor signal.
Dependencies are inferred from the claim text.