| 摘要 |
A distortion of a device under test (such as an optical fiber) can be precisely measured. There is provided a distortion measuring device including a signal processing unit 32 having a Brillouin scattered light spectrum recording unit 322 a which records a spectrum of Brillouin scattered light generated in an optical fiber as a result of supplying incident light, a Rayleigh scattered light spectrum recording unit 322 b which records a spectrum of Rayleigh scattered light generated in the optical fiber as a result of supplying the incident light, a deconvolution unit 324 which derives a Brillouin gain spectrum of the optical fiber based on the recorded spectrum of the Brillouin scattered light and the recorded spectrum of the incident light, a peak frequency deriving unit 326 which derives a peak frequency at which the derived Brillouin gain spectrum takes the maximum value, and a distortion deriving unit 328 which derives a distortion of the optical fiber based on the derived peak frequency.
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