Light modulation device and filter device
AssigneeMurata Manufacturing Co., Ltd.
InventorsShinichiro Chiku, Takashi Fujii
Life of this patent
Estimating the term…
Abstract
A light modulation device comprises: a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface; an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface; and one or a pair of transducers provided on the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, to modulate the light.
Claims16
A light modulation device comprising:
- a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;
- an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface;
- and
- at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal, wherein the magnetic garnet single crystal has a <110> direction or a <211> direction as the main surface.
A light modulation device comprising:
- a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;
- an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface;
- and
- at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal,
- wherein the magnetic garnet single crystal is a bulk single crystal.
A light modulation device comprising:
- a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;
- an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface;
- and
- at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal,
- wherein the magnetic garnet single crystal is an epitaxial thin-film.
A light modulation device comprising:
- a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;
- an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface;
- and
- at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal,
- wherein said at least one transducer functions as a resonator in response to said microwave signal.
A light modulation device comprising:
- a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;
- an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface;
- and
- at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal,
- wherein said at least one transducer comprises a gap, so as to function as a resonator in response to said microwave signal.
Dependencies are inferred from the claim text.