Kt Corporation

Yong-Gi Lee

Hyun-Ho Jeong

Ho-Jin Jeong

Kyoung-Seon Min

Bong-Wan Lee

Kyeong-Mo Youn

Young-Wook Lee

In order to identify an optical cable for optical communication from a remote place, a Sagnac interferometer including two strands of an optical fiber is formed in the optical cable, and a worker in the remote place applies a disturbance of a popping sound to an optical cable to be identified. The disturbance applied by the worker is detected and regenerated in the form of a sound. The optical cable can be easily identified by comparing the regenerated signal and the disturbed signal in the remote place to thereby prevent an incorrect optical cable from being cut. In addition, the optical cable can be more precisely identified by selecting a different light detecting frequency component in accordance with environment conditions.

Apparatus and method for identification of optical cable

Provided are an apparatus and a method for injecting liquid crystal into a hollow optic fiber. The apparatus includes: a first holder and a second holder each of which has a fluid passage for holding corresponding one end of the hollow optic fiber to be communicated with the fluid passage a container connected to a tube disposed with a valve at the fluid passage of the second holder and storing liquid crystal; an air supplying device connected to the first holder and the container through tubes having a plurality of valves to select an air passage for making the hollow optic fiber vacuous by sucking air out of the hollow optic fiber and forcedly injecting liquid crystal into the hollow optic fiber by supplying an air pressure.

Apparatus for injecting liquid crystal into hollow fiber and method thereof

Growing community of inventors

Daejeon, South Korea

Yong-Gi Lee