Optical fiber characteristic measurement device and optical fiber characteristic measurement method

Abstract

An optical fiber characteristic measurement device includes a light detection unit, a superimposing unit, and a processing unit. The light detection unit is configured to detect Brillouin scattered light obtained by injecting light into an optical fiber under test and configured to output a detection signal. The superimposing unit is configured to superimpose a measurement signal modulated at a predetermined frequency and swept over a predetermined frequency range on light that enters the optical fiber under test, light used to detect the Brillouin scattered light, or the detection signal. The processing unit is configured to obtain a spectrum indicating an intensity or amplitude distribution of a frequency component that is n times (n is an integer of 1 or more) the predetermined frequency contained in the detection signal.

Dependencies are inferred from the claim text.