Optical deflector and optical switch
First Claim
1. An optical modulator comprising:
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
w≦
0.5 0<
x≦
0.5, 0<
y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from the group consisted of lanthanum, niobium, tantalum, barium and strontium), and electrodes opposed to each other across the optical waveguide, an electric field being applied between the electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of a signal light propagating in the optical waveguide,the dielectric material having a first refractive index in its initial state, having a second refractive index by application of an electric field of a first polarity, and retaining a third refractive index obtained after the electric field has been removed, and the dielectric material having the third refractive index having the first refractive index by the application of an electric field of a second polarity different from the first polarity and removal of the electric field.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical deflector including an optical waveguide of a dielectric material having electrooptical effect; and a pair of electrodes opposed to each other across the optical waveguide. An electric field is applied between the opposed electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of signal light propagating in the optical waveguide, wherein the dielectric material has a first refractive index in its initial state, has a second refractive index by application of an electric field of a first polarity, and retains as a third refractive index a refractive index obtained after the electric field has been removed. The dielectric material having the third refractive index has the first refractive index by the application of an electric field of a second polarity different from the first polarity and removal of the electric field.
-
Citations
8 Claims
-
1. An optical modulator comprising:
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
w≦
0.5 0<
x≦
0.5, 0<
y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from the group consisted of lanthanum, niobium, tantalum, barium and strontium), and electrodes opposed to each other across the optical waveguide, an electric field being applied between the electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of a signal light propagating in the optical waveguide,the dielectric material having a first refractive index in its initial state, having a second refractive index by application of an electric field of a first polarity, and retaining a third refractive index obtained after the electric field has been removed, and the dielectric material having the third refractive index having the first refractive index by the application of an electric field of a second polarity different from the first polarity and removal of the electric field.
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
-
2. An optical deflector comprising:
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of(Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
w≦
0.5, 0<
x≦
0.5, 0<
y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from the group consisted of lanthanum, niobium, tantalum, barium and strontium); and
electrodes opposed to each other across the optical waveguide, an electric field being applied between the electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of a signal light propagating in the optical waveguide,the dielectric material having a first refractive index in its initial state, having a refractive index changed to a second refractive index by application of an electric field of a first polarity, and retaining a third refractive index obtained after the electric field has been removed, and the dielectric material having the third refractive index having the first refractive index by the application of an electric field of a second polarity different from the first polarity and removal of the electric field.
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of(Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
-
3. An optical deflector comprising:
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny) zO3 (wherein 0≦
w≦
0.5, 0<
x≦
0.5, 0<
y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from the szroup consisted of lanthanum, niobium, tantalum, barium and strontium); and
electrodes opposed to each other across the optical waveguide, an electric field being applied between the electrodes to change a refractive index of the dielectric material to thereby control a propagating direction of a signal light propagating in the optical waveguide,having a first deflection angle in its initial state, having a second deflection angle by application of an electric field of a first polarity, and retaining a third deflection angle obtained after the electric field has been removed, and having the first deflection angle by the application of an electric field of a second polarity different from the first polarity in a state having the third deflection angle and removal of the electric field.
- an optical waveguide formed of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny) zO3 (wherein 0≦
-
4. An optical deflector comprising:
-
a slab waveguide formed on a substrate and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
w≦
0.5, 0<
x≦
0.5, 0y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from a group consisted of lanthanum, niobium, tantalum, barium and strontium); and
an electrode formed on the slab waveguide, an electric field being applied to the slab waveguide by applying a prescribed voltage to the electrode to change a refractive index of the slab waveguide so as to control a propagating direction of a signal light propagating in the slab waveguide. - View Dependent Claims (5, 6)
-
-
7. A deflection direction control method for an optical deflector comprising:
- an optical waveguide of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
w≦
0.5, 0<
x≦
0.5, 0<
y≦
0.5, 0.8≦
z≦
1.2; and
M is one kind, or two or more kinds of elements selected from the group consisted of lanthanum, niobium, tantalum, barium and strontium); and
a pair of electrodes opposed to each other across the optical waveguide, for applying an electric field between the pair of electrode to change a refractive index of the dielectric material to thereby control a propagating direction of a signal light propagating in the optical waveguide, whereinan electric field of a first polarity is applied to the dielectric material of a first refractive index in its initial state and removing the electric field to thereby make the refractive index of the dielectric material to be a second refractive index different from the first refractive index, whereby a deflection direction of the signal light is changed. - View Dependent Claims (8)
- an optical waveguide of a dielectric material having electrooptical effect and formed of (Pb1-wMw)(Zr1-x-yTixSny)zO3 (wherein 0≦
Specification