Fabrication of Fiber Device with Long-Period Fiber Gratings at Locations under Applied Pressure and Its Application as Load Sensor

摘要

An optical-fiber device that forms long-period fiber gratings (LPFGs) only where pressure is applied is fabricated. The fabricated device is composed of a 60-cm-long metallic rod, with long-period gratings of a 720 μm period on the upper side and a rubber cover. We experimentally determined the optical-transmission properties of the fabricated device and found the device to be appropriate for use as an optical-fiber load sensor.