Abstract:
잡음특성의 큰 변화없이 이득특성을 향상시킨 1530nm 파장대역의 여기광원으로 여기된 장파장대역 에르븀 첨가 광섬유 증폭기에 관한 것으로, 이를 위한 본 발명은 장파장대역의 광신호가 입력되는 입력단, 1530nm 파장대역의 여기광원을 여기시키는 여기부, 상기 여기 광원과 입력 광신호를 결합시켜주는 파장분할다중화결합기, 및 상기 여기광원에 의해 고에너지준위를 가진 반전상태에서 상기 입력 광신호를 증폭하는 에르븀첨가 광섬유를 포함하여 이루어지고, 상기 여기부는 상기 1530nm파장대역의 여기 광원이 입력신호광과 같은 방향인 순방향여기, 반대방향인 역방향여기, 순방향여기와 역방향여기를 함께 이용한 양방향여기 또는 2단 증폭구조중 어느 하나를 이용하는 것을 특징으로 한다.
Abstract:
The present invention relates to a multi-channel optical transmission sub-assembly. The multi-channel optical transmission sub-assembly includes: a stem including a sub-mount; a plurality of light sources mounted on the sub-mount; a common ground pad which is formed on the sub-mount and uniformly connected to ground electrodes of the light sources; a common lead pin which is installed on the stem and connected to the common ground pad; and a thermistor which is mounted on the sub-mount with the light sources.
Abstract:
Disclosed is a method for improving the performance of an optical link failure monitoring device. The method for improving the performance of an optical link failure monitoring device according to an embodiment of the present invention can increase the accuracy of a distance of the optical link failure monitoring device by an initial correction method for a refractive index of optical fiber, and analyze an accurate failure position and a failure cause by a real-time correction method for the refractive index of the optical fiber when failure and performance degradation occur.
Abstract:
PURPOSE: A control device of an optical receiver and a method thereof having a delay path are provided to prevent unbalance of an optical receiver having a delay optical path. CONSTITUTION: A DI control unit(550) generates a varied minute control voltage on a delay path of an optical receiver. A Vpd monitoring unit(540) detects a first voltage value and a second voltage value applied to two optical detectors. A BER(Bit Error Rate) confirming unit(560) calculates a BER according to a signal outputted from the optical receiver. A control unit(570) sets up a varied minute control voltage. [Reference numerals] (100) Optical receiver; (510) PRBS pattern generating unit; (520) Optical DPSK signal generating unit; (530) Optical variable attenuator; (540) Vpd monitoring unit; (550) DI control unit; (560) BER confirming unit; (570) Control unit; (571) Setting unit; (572) Detecting unit; (573) Information writing unit; (574) Analyzing unit
Abstract:
PURPOSE: A transmission line structure for data communication and a designing method thereof are provided to greatly improve a reflecting value causing resonance in a desired frequency band by matching data signal lines between a PCB and a mainboard using an open stub of a microstrip line. CONSTITUTION: A first substrate layer(200) comprises a first layer(211) and a second layer(212). A data communication pattern(240) and a GND(Ground) pattern(230) are formed on one side of the second layer. The data communication pattern is connected to a data transmission line(201) on the first substrate layer. A second substrate layer(210) is laminated on the first substrate layer. A first impedance matching pattern(250) is formed by applying a CPW(CoPlanar Waveguide) structure. [Reference numerals] (AA) Upper side; (BB) Bottom side