Optical fiber characteristic measurement apparatus and optical fiber characteristic measurement method

Abstract

Brillouin gain spectra are measured at low cost. An optical fiber characteristic measurement apparatus 10 according to the present disclosure measures the characteristics of an optical fiber 1 by the Brillouin optical correlation domain reflectometry method. The optical fiber characteristic measurement apparatus 10 includes a local oscillator 122 that generates a sinusoidal electrical signal, a mixer 121 that receives Brillouin gain spectra resulting from Brillouin scattering in the optical fiber 1 and the sinusoidal electrical signal generated by the local oscillator 122 and outputs down-converted Brillouin gain spectra, and a frequency analyzer 123 that measures the down-converted Brillouin gain spectra.

Dependencies are inferred from the claim text.