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. The core layer includes a projected and relatively thick rib-structure, and a quasi-phase matched grating is formed in the rib.
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:
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:
PURPOSE: Provided is an organic compound which has optical property followed by substantially improved nonlinearity and can increase the chromophore density in a polymer. CONSTITUTION: The organic compound has a structure represented by formula 1 or 2. In the formulas, E and E' individually represent alkoxy group(-OR1) or alkyl amino group(-NR2R3), W and W' individually represent cyano group(-CN), alkylsulfonic group(-SO2R4), nitro group(-NO2) or fluoroalkyl group(-R5F), R1 to R3 individually represent C1-C8 alkyl group or C2-C6 alkyl group having hydroxyl groups at its ends, R4 and R5 individually represent C1-C6 alkyl group or phenyl group. The organic compound shows an excellent optical property.
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:
PURPOSE: A variable Fabry-Perot filter is provided to perform easily an alignment process between an optical fiber and a resonator medium by using a V-groove instead of an existing optical fiber ferrule. CONSTITUTION: V-grooves are formed on both end portions of a silicon block(1). Two optical fibers(3) are inserted and aligned into the V-grooves. A high reflective layers(4) is coated on one side of the optical fiber(3). The high reflective layers(4) coated on the optical fibers(3) are faced to each other. A resonator cavity medium(2) is fabricated by forming a high polymer multi-layer in the silicon between the V-grooves. A plurality of thermal electrodes(5,6) are formed on the high polymer multi-layer. The thermal electrodes(5,6) are formed by a gold plating electrode(6) of a thin film for supplying electric power to a heating line and a pad(5) of a thick film.
Abstract:
본 발명은 전기광학효과를 이용하는 폴리머 평면 광도파로 소자의 구조에 대한 것으로, 하나의 광도파로로 입사된 광의 경로를 분할하여 두 개의 광도파로로 진행시킨 다음 다시 하나의 광도파로로 합하도록 하는 마흐-젠더 간섭계 구조를 갖는 광소자에 있어서, 분할된 하나 또는 두 개의 광도파로에 열선을 형성하고 상기 열선에 열을 인가하여 도파로의 굴절률을 변화시켜 광소자의 바이어스를 조절하는 것으로서 폴리머의 전기적 특성에 영향을 받지 않고 소자 구동의 안정성을 향상시킬 수 있다.
Abstract:
PURPOSE: A side chain type polyamide ester is provided, which is an electrooptical or non-linear optical polymer excellent in an electrooptical or non-linear optical property and thermal stability and used for producing electrooptical or non-linear optical elements. And a film produced from the polymer is also provided. CONSTITUTION: The polyamide ester contains a repeating unit represented by the formula 1, wherein D is a residue of an organic colorant molecule having the electrooptical or non-linear optical property. The polyamide ester is produced by a process containing the steps of: preparing a polyamide acid by reacting a diamine monomer and an aromatic acid dianhydride; reacting the polyamide acid and the organic colorant molecule having a hydroxy group and the electrooptical or non-linear optical property. And the electrooptical or non-linear optical polymer film is produced by forming a film from the polyamide ester and poling at a high temperature under the electric field.
Abstract:
PURPOSE: A polymer optical waveguide device by using an electro optical effect is provided, which dose not affect on the electrical characteristics of the polymer by supplying driving voltage to a heating wire and using a thermo-optic effect. CONSTITUTION: A polymer optical waveguide device by using an electro optical effect includes a first optical waveguide(120) and a second optical waveguide(130). The first optical waveguide(120) is provided with a substrate, a bottom electrode formed on the top of the substrate, a bottom clad layer formed on the bottom electrode, a core layer formed on the bottom clad layer, a top clad layer formed on the top of the core layer and a top electrode formed on the top clad layer. And, the second optical waveguide(130) is provided with a substrate, a bottom clad layer formed on the substrate, a core layer formed on the top of the bottom clad layer, a top clad layer formed on the top of the core layer and a heating wire formed on the top of the top clad layer.
Abstract:
PURPOSE: An optical waveguide and its fabrication method are provided to reduce a driving voltage, a driving power and coupling loss of electro-optic waveguide devices or a thermo-optic devices. CONSTITUTION: The optical waveguide includes a bottom clad layer(104), and a core layer(106) which is formed on the bottom clad layer and transmits a light wave, and top clad layers(108,110) formed on an upper part of the core layer. At least one of the bottom clad layer and the top clad layer includes at least two clad layers. Two clad layers have different refractive indexes on an input/output region(A) of the light wave and an active region(C) where the light wave is modulated, so that a refractive index difference with the core layer is different.