Abstract: Disclosed is a method for manufacturing a multimode optical fiber for high data rate LAN using MCVD, which includes a deposition process for forming a clad layer and a core layer, doped with an additive for controlling a refractive index, on an inner wall of a quartz tube by injecting a deposition gas into the quartz tube and applying heat to outside of the quartz tube; and a collapse process, which is repeatedly conducted N times, for filling up a gap in the quartz tube by applying heat of a temperature over a deposition temperature to the quartz tube after the core layer is completely deposited. In the method, together with an N?1th collapse process, an etching process of injecting a reaction gas for etching into the quartz tube is conducted in order to eliminate a portion of which refractive index is transformed due to evaporation of the additive.

Abstract: The present invention relates to a method so called Bacterial Digitalcode System (BaDis) that identifies microorganism by using bacterial-specific, genus-specific and species-specific oligonucleotides from a variety of samples or specimens for detection and differential diagnosis of microorganism. Particularly, the present invention relates to bacterial-specific, genus-specific and species-specific oligonucleotides designed by the target nucleotide sequences of 23S rDNA or ITS gene, polymerase chain reaction (hereinafter, referred to as “PCR”) kits using the oligonucleotides as a primer, the microarray containing the oligonucleotides as a probe, and methods for detecting microorganism by using the oligonucleotides. Therefore, the present invention can be applied to detect the presence of microorganism and diagnose differentially all microorganism such as pathogenic bacteria of infectious diseases, bacteria inducing food poisoning, bacteria contaminating biomedical products and environmental pollutants.

Abstract: Disclosed is a method for manufacturing a multimode optical fiber for high data rate LAN using MCVD, which includes a deposition process for forming a clad layer and a core layer, doped with an additive for controlling a refractive index, on an inner wall of a quartz tube by injecting a deposition gas into the quartz tube and applying heat to outside of the quartz tube; and a collapse process, which is repeatedly conducted N times, for filling up a gap in the quartz tube by applying heat of a temperature over a deposition temperature to the quartz tube after the core layer is completely deposited. In the method, together with an N?1th collapse process, an etching process of injecting a reaction gas for etching into the quartz tube is conducted in order to eliminate a portion of which refractive index is transformed due to evaporation of the additive.

Abstract: Disclosed is a method for manufacturing a multimode optical fiber for high data rate LAN using MCVD, which includes a deposition process for forming a clad layer and a core layer, doped with an additive for controlling a refractive index, on an inner wall of a quartz tube by injecting a deposition gas into the quartz tube and applying heat to outside of the quartz tube; and a collapse process, which is repeatedly conducted N times, for filling up a gap in the quartz tube by applying heat of a temperature over a deposition temperature to the quartz tube after the core layer is completely deposited. In the method, together with an N?1th collapse process, an etching process of injecting a reaction gas for etching into the quartz tube is conducted in order to eliminate a portion of which refractive index is transformed due to evaporation of the additive.