Abstract: Disclosed are a distributed temperature sensing system using a multicore optical fiber and a method thereof. The distributed temperature sensing system using the multicore optical fiber is configured to use the multicore optical fiber for a typical distributed temperature sensing system (DTSS), analyze a signal by collecting, for all cores, Raman-scattered light that is backscattered by multiple cores, increase the size of the signal by the number of times corresponding to the number of cores, increase a signal-to-noise ratio (SNR) for the same sensing time, and increase a sensing distance.

Abstract: An optical cable identification apparatus for identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable. An optical unit transmits two optical signals to a single strand of optical fiber inside the optical cable, and detects a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside. A single-fiber ending unit generates the time difference. A signal processing unit removes noise from the two reflected optical signals and demodulates the optical signals. A sound output unit outputs the optical signals from the signal processing unit as sounds.

Abstract: An optical cable identification apparatus is disclosed. The optical cable identification apparatus capable of identity an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from an outside. An optical unit transmits two optical signals to a single strand of optical fiber inside the optical cable, and detects a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside. A single-fiber ending unit generates the time difference. A signal processing unit removes noise from the two reflected optical signals and demodulates the optical signals. A sound output unit outputs the optical signals from the signal processing unit as sounds.