Polymer Packaged Fiber Grating Pressure Sensor with Enhanced Sensitivity

This paper presents the development of a high sensitive pressure sensor employing an etched FBG encapsulatedin a partially-polymerfilledmetal cylinder. The sensor works by means of transferring radial or lateral pressure into an axially stretched-strain along the length of the FBG. The sensor was placed in a well-controlled pressure chamber and tested up to 0.1 MPa.The pressure sensitivity of the sensor is found to be 2.579 x 10 -2 MPa -1 which is well agreed with the simulated results. The test results show that the sensor possess good linearity and repeatability within the range of pressure measurement. This compact and low cost design of the sensor can be used for static and dynamic pressure measurements in industrial applications.