| An optical fiber sensing expansion apparatus (30) according to the present disclosure includes a sensor unit (32) storing a sensing optical fiber (33), a fixing unit for fixing the sensor unit (32) to a monitoring object (40), and a fiber connection unit (31) that is capable of connecting the sensing optical fiber (33) to an optical fiber (10), wherein the fiber connection unit (31) superimposes a detection result of the sensor unit (32) on an optical signal to be transmitted by the optical fiber (10). |
