Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymer compounds having polyimide repeating units coupled with the organic dye molecular material are provided. The organic dye molecular material coupled to a polymer main chain in the preparation of the nonlinear optical compound has the following: where X1 is carbon oxygen, sulfur, nitrogen, ester (CO2), or amide (CONR1), where R1 is an alky or phenyl group having 1 to 6 carbon atoms, D is an organic chromophore molecule, and n is an integer from 1 to 10.

Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymeric compounds having polyimide repeating units coupled with the organic dye molecular material are provided. The organic dye molecular material coupled to a polymer main chain in the preparation of the nonlinear optical polymeric compound has the following formula: where X1 is carbon, oxygen, sulfur, nitrogen, ester (CO2), or amide (CONR1), where R1 is an alky or phenyl group having 1 to 6 carbon atoms, D is an organic chromophore molecule, and n is an integer from 1 to 10.

Abstract: The present invention relates to a non-linear optical material having a dendrimer structure; and, more particularly, to a non-linear optical material having organic chromophores at the ends and formed based on ester linkages and/or ether linkages. Since the non-linear optical material of the present invention is formed based on ester linkages and/or ether linkages, it is very stable. Also, because it is a dendrimer structure, it has the properties of a polymer while having a strong connection ability at the ends, and this makes the non-linear optical material easily adopt organic chromophores easily. As it is stable thermally and optically, it can be applied to optical communication usefully.

Abstract: The invention relates to a polymer material having electro optic and nonlinear optical properties suitable for manufacturing a device using the electro optic and nonlinear optical properties. More particularly, the present invention relates to a polymer material having excellent electro optic properties and optical nonlinearities, maintaining the properties under the manufacturing conditions of high temperature, and having physical, chemical, and optical stabilities by introducing an organic chromophore as a side chain of the polymer so that the polymer material can be suitable for manufacturing an electro optic and nonlinear optical device, to a film manufactured from the polymer material, and to a method of manufacturing the polymer material.

Abstract: In a wavelength converter using a nonlinear polymeric waveguide, a wavelength variable wavelength converter having a nonlinear polymeric waveguide in which insertion losses are minimized and wavelength conversion efficiencies are improved, and an optical device using the wavelength converter are provided. The wavelength converter for converting the wavelength of inputted light includes a semiconductor substrate, a first electrode formed on the semiconductor substrate, a lower cladding layer formed on the first electrode, a core layer formed on the lower cladding layer and formed of nonlinear polymer by which the wavelength of light is substantially converted by the inputted light, an upper cladding layer formed on the core layer, and a second electrode formed on the upper cladding layer, which tunes center wavelengths of the conversion by adjusting the refractive index of the core layer.

Abstract: A host-guest polymer system including a polymer with an isoimide group and an organic chromophore and capable of converting into a side-chain polymer system, a side-chain nonlinear optical polymer derived from the host-guest polymer system, and a method for synthesizing the side-chain nonlinear optical polymer are provided. The method for synthesizing the side-chain nonlinear optical polymer involves forming a nonlinear optical polymer film based on a host-guest system in which an organic chromophore having a reactive group capable of nucleophilic reaction with an isoimide group is dispersed in a matrix including a polymer with the isoimide group having the following formula: Next, the nonlinear optical film is poled at a first temperature in an electric field; and the organic chromophore is reacted with the polymer while poling at a second temperature which is higher than the first temperature, to synthesize the side-chain nonlinear optical polymer.

Abstract: The present invention relates to a non-linear optical material having a dendrimer structure; and, more particularly, to a non-linear optical material having organic chromophores at the ends and formed based on ester linkages and/or ether linkages. Since the non-linear optical material of the present invention is formed based on ester linkages and/or ether linkages, it is very stable. Also, because it is a dendrimer structure, it has the properties of a polymer while having a strong connection ability at the ends, and this makes the non-linear optical material easily adopt organic chromophores easily. As it is stable thermally and optically, it can be applied to optical communication usefully.

Abstract: The present invention relates to a polymer optical waveguide device using electrooptic effect. A polymer optical waveguide device has Mach-Zehnder interference system structure of dividing a path of a light applied to one optical waveguide into two paths, making the light travel through two optical waveguides, and combining the two optical waveguides into one optical waveguide. A heater is formed on branched one optical waveguide or two optical waveguides. Current is applied to the heater to change the index of refraction of the waveguides so that the bias of the optical device is controlled. The device of the present invention does not affected by the electric characteristic of the polymer but the reliability of the device operation can be improved.

Abstract: The invention relates to a polymer material having electro optic and nonlinear optical properties suitable for manufacturing a device using the electro optic and nonlinear optical properties. More particularly, the present invention relates to a polymer material having excellent electro optic properties and optical nonlinearities, maintaining the properties under the manufacturing conditions of high temperature, and having physical, chemical, and optical stabilities by introducing an organic chromophore as a side chain of the polymer so that the polymer material can be suitable for manufacturing an electro optic and nonlinear optical device, to a film manufactured from the polymer material, and to a method of manufacturing the polymer material.

Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymeric compounds having polyimide repeating units coupled with the organic dye molecular material are provided. The organic dye molecular material coupled to a polymer main chain in the preparation of the nonlinear optical polymeric compound has one of the following formula: where X1 is carbon, oxygen, sulfur, nitrogen, ester (CO2), or amide (CONR1), where R1 is an alky or phenyl group having 1 to 6 carbon atoms, D is an organic chromophore molecule, and n is an integer from 1 to 10.

Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymeric compounds having polyimide repeating units coupled with the organic dye molecular material are provided.

Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymer compounds having polyimide repeating units coupled with the organic dye molecular material are provided.

Abstract: The present invention relates to an optical waveguide and method of manufacturing the same. An optical waveguide is constructed using a clad layer having a refractive index almost same to a core layer in an input/output region coupled to an optical fiber. The optical waveguide is constructed using the clad layer having a large difference in the refractive index with the core layer in an active region having an electrode. Therefore, a driving voltage, a driving power and a coupling loss are reduced to improve a characteristic of the optical waveguide device.

Abstract: A host-guest polymer system including a polymer with an isoimide group and an organic chromophore and capable of converting into a side-chain polymer system, a side-chain nonlinear optical polymer derived from the host-guest polymer system, and a method for synthesizing the side-chain nonlinear optical polymer are provided.

Abstract: In a wavelength converter using a nonlinear polymeric waveguide, a wavelength variable wavelength converter having a nonlinear polymeric waveguide in which insertion losses are minimized and wavelength conversion efficiencies are improved, and an optical device using the wavelength converter are provided. The wavelength converter for converting the wavelength of inputted light includes a semiconductor substrate, a first electrode formed on the semiconductor substrate, a lower cladding layer formed on the first electrode, a core layer formed on the lower cladding layer and formed of nonlinear polymer by which the wavelength of light is substantially converted by the inputted light, an upper cladding layer formed on the core layer, and a second electrode formed on the upper cladding layer, which tunes center wavelengths of the conversion by adjusting the refractive index of the core layer.

Abstract: A tunable Fabry-Perot filter is provided with two optical fibers each being coated with a high-reflective thin film at its one end, a silicon block for aligning the two optical fibers with each other having a pair of V-shaped grooves formed at both ends thereof, respectively, a resonant cavity medium of silicon or polymeric material having a high coefficient of thermo-optic effect, and a thermal electrode for applying heat to the resonant cavity medium.

Abstract: Organic dye molecular materials prepared by coupling existing organic chromophore molecules to benzene or carbazole derivatives and nonlinear optical polymeric compounds having polyimide repeating units coupled with the organic dye molecular material are provided.

Abstract: The present invention makes light input/output portions being a coupling portion with an optical fiber and a Y-branch using a rib waveguide, and a bending portion using a channel waveguide, wherein the rib waveguide and the channel waveguide is connected by a tapered waveguide. So that the present invention can improve the crosstalk, loss and operating voltage characteristics.

Abstract: Disclosed is a thermo-optic tunable attenuator, which comprises a single mode channel optical waveguide, an optical waveguide of a Mach-Zehnder interferometer structure coupled with the single mode channel optical waveguide, the optical waveguide including two symmetric Y-branches, and two metal heating wires for applying power to one side of each of the two symmetric Y-branches, wherein the two metal heating wires are in a facing relationship with each other, wherein a refractive index of the optical waveguide is changed in response to a power applied to any one of the two metal heating wires.

Abstract: The present invention makes light input/output portions being a coupling portion with an optical fiber and a Y-branch using a rib waveguide, and a bending portion using a channel waveguide, wherein the rib waveguide and the channel waveguide is connected by a tapered waveguide. So that the present invention can improve the crosstalk, loss and operating voltage characteristics.