OPTICAL FIBER DISTORTION AND TEMPERATURE MEASURING DEVICE AND OPTICAL FIBER DISTORTION AND TEMPERATURE MEASURING METHOD

摘要

To remove the influence of loss in intensity caused by connector connection of an optical fiber and connection of a different type of an optical fiber.SOLUTION: Reference intensity change ratio acquisition means acquires information on an intensity change ratio in an initial state from information on intensity obtained by a signal intensity acquisition unit as a reference intensity change ratio. Intensity change ratio acquisition means acquires information on an intensity change ratio from the information on intensity obtained by the signal intensity acquisition unit. Subtraction means subtracts the reference intensity change ratio from the intensity change ratio acquired by the intensity change ratio acquisition means to acquire an offset removal intensity change ratio. Distortion and temperature separation means separates and acquires a distortion change amount δε and a temperature change amount δT from a frequency shift amount acquired by a frequency shift amount acquisition unit and the offset removal intensity change ratio.SELECTED DRAWING: Figure 2