| 摘要 |
PROBLEM TO BE SOLVED: To efficiently measure polarized wave mode dispersion PMD at each position L in an optical fiber 18. SOLUTION: Information of light a propagating at each position L in the optical fiber 18 is obtained by utilizing backward scattered light b generated in the optical fiber 18. Furthermore, a light source part 10 for emitting a plurality of pulselike light a1 , a2 having wavelengthsλ1 ,λ2 different from each other at a fixed measurement period TS and a light wave synthesizer 14 for synthesizing each light a1 , a2 emitted from the light source part into one light a are adopted to incorporate a plurality of light pulses a1 , a2 having different wavelengths in one measurement period TS for the light a entering the optical fiber 18.
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