Optical fiber refractive index measurement method and optical fiber refractive index measuring device

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber refractive index measuring device and an optical fiber refractive index measuring method capable of measuring an optical fiber refractive index easily and accurately.;SOLUTION: This optical fiber refractive index measuring device includes an optical frequency chirp pulsing light source 1 for generating pulsing light p_in whose optical frequency is changed linearly, an optical branching device 2 for branching the pulsing light p_in from the optical frequency chirp pulsing light source 1 into a measuring route 4 and a reference route 5, an optical multiplexer 8 for multiplexing measuring pulsing light ϕ₁ propagating through the measuring route 4 with reference pulsing light ϕ₂ propagating through the reference route 5, an optical pulse detector 3 for detecting a pulse waveform of the multiplexed pulsing light p_out multiplexed by the optical multiplexer 8, an optical path length adjuster 6 for varying an optical path length of the reference route 5, and an optical connector 7 for connecting an optical fiber drawably in the middle of the measuring route 4.;COPYRIGHT: (C)2011,JPO&INPIT