Patent ID: 8337080

Claim:
An object temperature distribution measuring method of measuring temperature distribution in a predetermined measurement region of an object by using a BOCDA-type optical fiber sensor, said measuring method comprising the steps of: preparing an optical fiber which includes a sensor portion that comes close to or comes in contact with the object, said sensor portion being disposed two-dimensionally on the predetermined measurement region of the object while suppressing fluctuation of relative position of each part thereof; inputting pumping light from one end of said optical fiber, while inputting probe light from the other end of said optical fiber; measuring Brillouin gain spectrum induced at a desired position of said optical fiber in a longitudinal direction by modulating frequencies of the pumping light and probe light inputted oppositely from both ends of said optical fiber; and determining, as the temperature distribution of the predetermined measurement region of the object, the temperature distribution of said sensor portion disposed two-dimensionally along the longitudinal direction of said optical fiber.