Ls Cable & System Ltd.

Ls Cable Ltd.

Lg Cable Ltd.

Lae-Hyuk Park

Ji-Hyung Lee

Un-kyu Park

Ji-Sang Park

Sung-Han You

Young-Sun Kim

Ki-Yeul Kim

Heung-kyu Lee

Min-Seok Han

Sung-Hoon Moon

Ki-Wan Jang

Hyoung-Koog Lee

Chan-Joo Lee

Tae-Kyung Yook

Eun-Jeong Yang

Joong-Kwan Kim

Soon-Il Sohn

Kwan-Hee Han

Un-Kyoo Park

Hyung-Soo Shin

Soon-Il Son

Jae-Sun Kim

Provided is a wireless power antenna for wirelessly transmitting, receiving, or relaying power, the wireless power antenna comprising an insulating sheet and a wireless power coil including a split pattern unit including a plurality of patterns spaced from each other in at least a region thereof in a widthwise direction, wherein the split pattern unit is disposed on both a top surface and a bottom surface of the insulating sheet.

Antenna for wireless power, and dual mode antenna comprising same

Disclosed is an optical line monitoring system and method which detects an optical line where a disorder occurs, by using an OTDR (Optical Time Domain Reflectometer) pulse pattern with matching information. The optical line monitoring system generates and stores a reference OTDR pulse pattern matched with identification information of an optical channel service unit, and compares the matched reference OTDR pulse pattern with the OTDR pulse pattern collected at an inspection time to verify an optical line region where a disorder occurs.

Optical line monitoring system and method

A wireless power transmission apparatus includes at least one power transmission antenna for transmitting a wireless power signal in a magnetic resonance manner by using a resonant frequency having different bandwidths from each other; a wireless power signal generating module for generating the wireless power signal; at least one wireless power converting module for converting a power level of the wireless power signal generated by the wireless power signal generating module and having different power level conversion ranges corresponding to the bandwidth of the resonant frequency of the power transmission antenna; a multiplexer matching module for selectively connecting the wireless power converting module to a corresponding power transmission antenna; and a control unit for selectively connecting the power transmission antenna and the wireless power converting module according to a required power of a device to be charged to adjust the power level of the wireless power signal.

Apparatus for wireless power transmission using multi antenna and method for controlling the same

An optical and power composite cable includes a plurality of power lines adjacently arranged in a cable, each power line having a central conductor and an insulating coating layer surrounding the central conductor; at least one optical fiber unit arranged together with the power lines, each optical fiber unit having at least one optical fiber and a tube surrounding the optical fiber; and a cable sheath surrounding the power lines and the optical fiber unit, wherein, assuming that the thickness of the tube is t and that the outer diameter of the tube is D, the ratio of the thickness of the tube to the outer diameter defined as t/D is 8% to 20%.

Composite cable for transmitting optical signals and supplying electric power

A method for manufacturing a single mode optical fiber with a reduced PMD (Polarization Mode Dispersion), by drawing an optical fiber preform composed of a core and a clad surrounding the core, includes (a) heating the optical fiber preform to a high temperature using a furnace, and drawing an optical fiber from an outlet of the furnace at a linear velocity (V) of 500 mpm or above by means of neck-down drawing; and (b) impressing a spin on the optical fiber by means of a spin impressing device provided on a drawing path of the optical fiber, wherein a maximum spatial frequency of spin (y) impressed on the optical fiber satisfies the following equations andt=(0.21&#xd7;CladOval)+(0.04&#xd7;CoreOval)+(0.17&#xd7;ECC), where y is a maximum spatial frequency of spin [turns/m], Vis a drawing velocity [mpm], CladOval is a clad ovality [%], CoreOval is a core ovality [%], and ECC is an eccentricity [&#x3bc;m].

Method for manufacturing single mode optical fiber having low polarization mode dispersion

Disclosed is a method of manufacturing an optical fiber perform using MCVD including dehydration and dechlorination, which executes the following process repeatedly with changing the composition of soot generation gas according to the refractive index profile, the process including the steps of: forming a soot layer having pores on an inner wall of a deposition tube at a temperature lower than the soot sintering temperature with putting soot generation gas and oxygen gas into the rotating deposition tube; removing hydroxyl groups with keeping the pores by putting dehydration gas into the deposition tube; removing chlorine impurities existing in the soot layer with keeping the pores by putting dehydration gas into the deposition tube; and sintering the soot layer by heating the deposition tube at a temperature over the soot sintering temperature.

Method of manufacturing optical fiber preform using modified chemical vapor deposition including dehydration and dechlorination process and optical fiber manufactured by the method

Growing community of inventors

Seoul, South Korea

Lae-Hyuk Park