Optical pulse testing device and optical pulse testing method

Abstract

An object of the present invention is to provide an optical pulse test apparatus that can test an optical fiber cable at once in a short period of time. The optical pulse test apparatus according to the present invention includes: an optical pulse signal generation unitthat emits an optical pulse with a width that is n times as large as a pulse width T corresponding to desired spatial resolution; a light reception unitthat receives reflected light and back-scattered light from n FUTs; an optical path control unitthat switches paths connected to the n FUTs are connected at an interval T, inject the optical pulse, as a test optical pulse having the pulse width T, sequentially into the paths, then switches the paths at an interval ts that is shorter than the time period T, and emit the reflected light and the back-scattered light from the n FUTs sequentially onto the light reception unitat an interval n×ts; and an arithmetic processing unitthat divides the electrical signal output from the light reception unit, with an interval equal to the interval ts at which switching the paths is performed, into discrete signals respectively corresponding to the FUTs, and calculates the reflectance distributions of the reflected light and the back-scattered light of the respective FUTs.