Abstract:
본 발명은 높은 선형성과 밀리초 단위의 동작속도, 편광독립, 35 dB 이상의 감쇄영역을 얻을 수 있고 집적광회로에 적용하는데 적합한 열광학 가변광쇄기에 관한 것으로, 단일모드 채널광도파로, 상기 채널광도파로에 접속되며 두 개의 대칭형 Y-분기로 구성된 마하-젠더 간섭계 광도파로, 및 상기 마하-젠더 간섭계 광도파로 상부에 대칭적으로 위치하여 상기 각 대칭형 Y-분기의 일측에 열을 인가하는 두 개의 금속열선을 포함하여 이루어지며, 상기 금속열선에 인가된 전력에 의해 상기 각 대칭형 Y-분기의 굴절율을 변화시킨다.
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:
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:
PURPOSE: An all-optical wavelength converter and converting method are provided to generate efficiently a difference frequency, a cascade process, and the second harmonic wave by using a birefringence phase matching method. CONSTITUTION: A polymer lower cladding(120) is formed on a surface of a silicon wafer(100). A non-linear polymer core(160) is formed from an input terminal to an output terminal on the polymer base cladding(120). The polymer lower cladding(120) and the non-linear polymer core(160) are formed by a spin coating method. A polymer upper cladding(140) is formed on the non-linear polymer core(160) except for the exposed parts of the input terminal and the output terminal by using the spin coating method.
Abstract:
PURPOSE: A thermo-optic tunable attenuator is provided, which has a high linearity and a light attenuation area above 35dB and an operation speed of milliseconds by preventing power consumption according to the nonlinearity of a light attenuation variation as to an applied external power. CONSTITUTION: An optical waveguide of a Mach-Zehnder interferometer structure includes two single mode channel waveguides(20a,20b) coupling signals incident from an optical fiber into a single mode and two symmetric Y-branches(21a,21b) branching a signal being output from the single mode channel waveguides into two beams. Two metal heat lines(30a,30b) are located on the waveguide(21) and varies a refractive index of the waveguide. The first gold electrode(41) supplies a power by connecting two metal heat lines serially at a center of the Mach-Zehnder interferometer waveguide. The second metal electrodes(42a,42b) supply a power by being connected to the metal heat lines respectively.
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:
A wavelength converter for converting wavelength of a signal beam combined to a pump beam. The wavelength converter comprises a mode converting region for converting mode of the pump beam; a direction combining region for combining the signal beam to the pump beam; and wavelength converting region for converting the wavelength of the signal beam combined to the pump beam. The mode converting region and the wavelength converting region are formed as integrated by nonlinear polymeric material to construct a polymeric waveguide extended along propagation direction. The wavelength converting region includes the nonlinear polymer poled to a predetermined direction. According to the present invention, a DFG device, a cascade wavelength converting device, and second harmonic generation device of higher energy converting efficiency can be developed.
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:
PURPOSE: An electric optical polymer for a wavelength division multiplexing optical communication network, a high speed tunable selecting filter using multi-grating and their operating method are provided to enable implementation of a dense wavelength division multiplexing based optical communication and be used for an optical information storing device technique utilizing an optical refraction. CONSTITUTION: An optical waveguide(103) collects a plurality of lights made incident to a single mode. A Bragg grating unit passes only a light of a desired wavelength among the plurality of lights made incident along the optical waveguide(103) and reflects the remaining lights along the optical waveguide(103) to emit them externally. A proceeding waveform electrode(105) changes a region of a Bragg grating reflection wave by an electro-optical effect and transmits or reflects a specific wavelength selectively. A TEC(106) tunes the wavelength of the whole bragg reflection wave by using a heat optical effect of a polymer.