OPTICAL CHARACTERISTIC MEASUREMENT DEVICE USING INTERROGATION OPTICAL FIBER, OPTICAL FIBER SENSOR SYSTEM PROVIDED WITH SAME, AND OPTICAL CHARACTERISTIC MEASUREMENT METHOD

摘要

The present invention relates to an optical characteristic measurement system using an interrogation optical fiber, the optical characteristic measurement system comprising: a light source unit for emitting an input light of a specific wavelength; a sensing unit for generating a signal light by a sensor affecting an optical characteristic according to external environmental conditions; and a measurement unit for deriving a changed physical quantity through the signal light transferred through the sensing unit, wherein the measurement unit comprises: a photocoupler for distributing the signal light to two optical paths; and an interrogation optical fiber arranged on one path through which the signal light moves, and the interrogation optical fiber linearly exhibits optical absorption in an area of a specific wavelength, derives a wavelength of the signal light moving in the sensing unit through an optical intensity measurement of the signal light, and finally, derives a physical quantity applied from the outside.