Abstract:
PURPOSE: A terahertz wave trans-receiving module, and an apparatus including thereof are provided to effectively applying the voltage for improving the heat radiation efficiency. CONSTITUTION: A terahertz wave trans-receiving module comprises the following: a photo mixer chip(10) including an active layer(14), antennas, and electrode pads; a lens(20) located on the upper side of the photo mixer chip; a circuit board(30) including solder balls(34) connected to the electrode pads under the photo mixer chip facing the lens; and a package surrounding the lower surface and the side surface of the circuit board, and emitting heat generated from the active layer to outside.
Abstract:
PURPOSE: A laser device is provided to minimize output intensity difference between first and second laser light sources, by changing a gain curve of an active layer. CONSTITUTION: A 1×2 distributor is arranged on a substrate. The 1x2 distributor includes a stem core, a first branch core and a second branch core. An active layer(110) is connected to the stem core. The active layer generates a light source with plural wavelength. The active layer provides gain. A first diffraction grating(125a) is coupled to the first branch core. A second diffraction grating is coupled to the second branch core. An active layer-micro heater(140a) supplies heat to the active layer. A first and a second micro heater(145a,145b) supply heat to the first and the second diffraction grating respectively.
Abstract:
PURPOSE: A photo mixer module and terahertz wave generating method thereof are provided to increase the strength of exciting light for generating a terahertz wave, thereby increasing the stability of the photo mixer. CONSTITUTION: A semiconductor optical amplifier(110) amplifies incident laser light. The semiconductor optical amplifier includes a gain waveguide(112) and an electrode(114) for amplifying incident excitation light. A photo mixer(120) generates a consecutive terahertz wave by exciting the amplified laser light. The photo mixer comprises electrodes(126,127) for providing bias to antennas(124,125). The photo mixer is formed of the same module as the semiconductor optical amplifier.
Abstract:
PURPOSE: A dual mode optical fiber laser module is provided to obtain two stable oscillating wavelength by controlling the two oscillating wavelength using injection locking method within the optical fiber laser oscillator. CONSTITUTION: A dual mode optical fiber laser module(200) comprises an optical fiber laser(210), a first injection locking unit(222) offering the first injection locking to the optical fiber laser, and a second injection locking unit(224) offering the second injection locking to the optical fiber laser. A first wavelength of the first injection locking unit and a second wavelength of the second injection locking unit are different from each other.
Abstract:
PURPOSE: An upward light source apparatus of a PON system and a light source generation method thereof are provided to supply in order to include a plane gain property and a dispersion compensation property. CONSTITUTION: An amplification unit(210) amplifies an injection light. A reflection unit(220) is inputted the amplified injection light. The reflection unit generates a reflection light including a light delay different according to a wavelength of the amplified injection light. The reflection unit decides a reflective rate according to the wavelength of the amplified injection light. The amplification unit includes a gain waveguide for amplifying the injection light.
Abstract:
PURPOSE: A communication device is provided to transmit a signal to an antenna among a plurality of antennas corresponding to the frequency of the signal. CONSTITUTION: A light source(110) outputs an optical signal including a target frequency component corresponding to target frequency. A plurality of antennas(120) comprises different frequency characteristics. A control circuit(130) transfers the optical signal to an antenna selected among plurality of antenna corresponding to a target frequency component having frequency characteristic. The selected antenna receives input of the optical signal. The selected antenna transmits the transmission signal having goal frequency component.
Abstract:
PURPOSE: A photomix module is provided to ensure the productivity and reliability thereof by forming a Fresnel lens at the back surface of the substrate. CONSTITUTION: A photomix module(130) includes a substrate(132), a photomix structure(135) and a Fresnel lens structure. The Fresnel lens structure is provided to the lower portion of the substrate, and the photomix module collects a terahertz wave of a photomix structure the light incident to the substrate through the Fresnel lens structure. The Fresnel lens(131) is arranged with the photomix structure, and collects the terahertz wave of the photomix structure through the diffraction.
Abstract:
본 발명은, 광 대역 전송망에서 이용되는 광 소자에 관한 것으로, 특히 광 신호의 향상된 편광 보상 기능을 갖는 광 소자 및 이의 제작 방법에 관한 것이다. 이를 위하여 본 발명의 일실시 예에 따른 편광 무의존 슬랩 도파로는, 기판의 일측 상부에 형성되며 입력되는 광 신호를 도파시키는 광 도파 영역; 및 상기 기판의 타측 상부에 형성되며 상기 광 도파 영역으로부터 입력되어 회절 격자에서 반사 및 회절되는 광 신호의 편광을 보상하는 편광 보상 영역을 포함하되, 상기 광 도파 영역은, 상기 기판의 일측 상부에 차례로 형성된 하부 클래드 층, 제 1 코어 층 및 상부 클래드 층을 포함하고, 상기 편광 보상 영역은, 상기 광 도파 영역으로부터 연장되어 상기 기판의 타측 상부에 차례로 형성된 하부 클래드 층, 제 1 코어 층, 상부 클래드 층 및 상기 제 1 코어 층과 상기 상부 클래드 층 사이에 형성된 제 2 코어 층을 포함으로써, 본 발명은 종래 편광 보상 광 소자에 비하여 향상된 신뢰도를 갖는 광 소자를 제공한다. 슬랩 도파로, 다중화기, 회절 격자, 편광 보상
Abstract:
파장 선택 스위치가 개시된다. 본 발명의 파장 선택 스위치는 복수의 파장이 입사된 광을 파장별로 분리하여 출력하는 광 역다중화기; 파장별로 분리된 광을 선택적으로 증폭 또는 흡수하는 광 증폭기; 광 증폭기의 출력을 선택적으로 편향시키는 광 편향기; 및 선택적으로 편향된 광을 다중화하여 출력하는 광 다중화기를 포함함을 특징으로 한다. 파장 선택 스위치, 광 편향기, 광 다중화기, 광 역다중화기, 광 증폭기
Abstract:
본 발명은 전기 광학적 크로스토크 및 수율을 개선할 수 있는 트랜스미터 및 리시버를 포함하는 양방향 모듈 및 그 제조방법을 개시한다. 개시된 본 발명은, 트랜스미터 및 리시버로 구성되는 양방향 모듈로서, 상기 트랜스미터는 외부 공동(external cavity)을 갖는 DFB(distributed feedback) 레이저 다이오드를 포함한다. 양방향 모듈, 레이저 다이오드, 크로스토크, 외부 공동