Abstract:
PURPOSE: A burst mode optical repeater is provided to increase transmission distance and the number of subscribers. CONSTITUTION: An optical receiver(110) receives a weak optical signal transmitted from an optical network unit to an uplink, and an optical transmitter(120) transmits the optical signal received through the optical receiver to an optical line terminal. A delay controller(130) generates a burst enable signal from the strength of the optical signal received by the optical reception unit, and the optical signal transmitted through the optical transmission unit has a burst characteristic by using the signal. The optical receiver optically converts the received optical signal into an electrical signal.
Abstract:
PURPOSE: A manufacturing method of a through wafer via having thick insulation layer is provided to minimize the electrical crosstalk by adjusting the thickness of insulating material and a diameter of via core. CONSTITUTION: A first via-hole(3-1) is formed on a wafer(1). A second via hole(3-2) is formed within the first via-hole. A via core(7) is formed within the first via-hole. A space between the via hole and the via core is filled with the film insulating material. The film insulating material is sucked through the second via hole on the back of the wafer.
Abstract:
PURPOSE: An advertisement service server system and a television broadcast receiving system associated with the same are provided to perform TV advertisement in cheap prices by making an advertiser register the advertisement directly. CONSTITUTION: An advertisement registration unit(110) receives a selection standard value by selection standards selected from an advertiser, the first access information expressing intuitively the minimum information of goods and the secondary access information expressing the detailed information of advertisement from an advertiser terminal. The advertisement registration unit registers the information as advertisement related information in a database(170). A metadata transmitting unit(120) transmits the advertisement related information at a meta data type to a service subscriber terminal.
Abstract:
PURPOSE: An optical waveguide apparatus and an optical transmitting/receiving module apparatus for optical path conversion are provided to prevent the deterioration of combination rate of an optical signal. CONSTITUTION: An optical waveguide device includes a core(210) and a cladding unit(200). The cladding unit is formed around the core, and one portion of the optical waveguide apparatus is tilted to diffract the inputted and outputted optical signal. The tilted one end portion is an inclination unit(230). In order to make the optical signal incident through the cladding unit progress in parallel, a diffraction unit(220) diffracts the optical signal. The long period Bragg diffraction grating of the diffraction unit selects the light of a certain wavelength band.
Abstract:
PURPOSE: An OLT(Optical Line Termination) implementing an optical receiving interface from CM(Continuous Mode) signal process element, an operation method for an interface and an operation method for the CM signal process of the OLT are provided to process the burst signal by using the CM signal process element. CONSTITUTION: A light receiving unit(410) comprises CM signal processing elements of a general purpose. The CM signal processing elements restores the clock and data from optical signal transmitted from a plurality of ONTs. A controller(430) controls a plurality of ONUs in order to continue the light signal received from the light receiving unit. The controller excludes a guard time for preventing the collision of data transmitted from ONUs.
Abstract:
본 발명은 가입자 단말 이상 동작 여부의 원격 진단 장치 및 그 방법에 관한 것으로 특히, 수동 광가입자망 시스템에서 가입자 단말의 이상 여부를 중앙국에서 원격으로 진단하는 장치 및 그 방법에 관한 것으로 본 명세서에서 개시하는 가입자 단말 이상 동작 여부의 원격 진단 장치는 상향 신호로부터 사용자 단말의 오류 발생을 감지하고 상기 상향 신호의 주파수 스펙트럼을 분석하는 주파수 분석부; 및 상기 스펙트럼의 모양에 맞는 특정 주파수를 결정하고, 이 특정 주파수와 진단 대상 사용자 단말로부터 전송된 이상 여부 진단용 신호의 최대 주파수를 상호 비교하여 상기 사용자 단말의 이상 동작 여부를 진단하는 이상 여부 진단부를 포함하여 본 발명의 목적 및 기술적 과제를 달성한다. 수동 광가입자망(Passive Optical Network), Ethernet-PON, ATM-PON, WDM-PON, 고장 진단 방법, ONT(Optical Network Terminal)
Abstract:
본 발명은 광통신 시스템에서 사용되는 파장 검출 및 안정화 장치와 그 방법에 관하여 개시한다. 본 발명은 투과형 광 검출기(Transmittance Photodetector)의 투과 특성을 이용하여 하나의 패브리-페롯 필터(Fabry-Perot filter)의 파장 투과 특성에 의해 패브리-페롯 필터의 뒤에서 광을 검출함으로써 파장분할 다중화 방식의 파장간격을 만족하는 파장 안정화 기능을 제공한다. 따라서, 본 발명은 부품 수를 줄여서 장치를 소형화할 수 있으며, 장치의 정렬과정이 생략되어 생산비용을 절감할 수 있다.
Abstract:
PURPOSE: A flip-chip bonding method using an slanted groove for optical passive alignment is provided to improve junction precision of an LD(laser diode) chip by minimizing small misalignment between a semiconductor chip and the surface of a substrate after the semiconductor chip and an optical fiber or a planar optical waveguide are initially aligned. CONSTITUTION: A photoresist pattern is formed on a substrate(30) corresponding to a solder bump(22) formed on the bottom surface of a semiconductor chip. An etch process is performed along the photoresist pattern formed on the substrate to form a bonding groove(34). A UBM(under bump metal)(35) is formed in the bonding groove. While the solder bump in the semiconductor chip is aligned with the bonding groove, the solder bump is heated below a melting-point temperature and the semiconductor chip is closely attached to the bonding groove. The heated solder bump is cooled to fix the semiconductor chip to the substrate.
Abstract:
PURPOSE: An optic fiber is provided to be capable of increasing the focal length of light by forming a semi-circular type concave part at the end portion of the optic fiber and filling predetermined material having a higher refraction index than that of the optic fiber into the semi-circular type concave part. CONSTITUTION: An optic fiber is provided with a core part(11) and a clad part(12). The optic fiber further includes a concave part(15) formed at one end portion of the core part and the clad part. And, predetermined material having a higher refraction index than that of the core part is filled into the concave part. In the device, the concave part is formed into a semi-circular type structure, a wet etching process is carried out for forming the concave part.