Design & Simulation of Optical Fiber Bragg Grating Pressure Sensor for Minimum Attenuation Criteria

This paper presents the design & simulation of an Optical Fiber Bragg Grating (OFBG) sensor for stress, strain measurement and also demonstrates the methodology to arrive at the optimal grating pitch dimensions for a given interrogating wavelength. The wavelength chosen for interrogation of the Fiber Bragg Grating (FBG) sensor is from the third window so as to minimize the attenuation of the light signal in the communication link from Fiber Bragg Grating sensor to the electronic instrumentation. Before actually inscribing the grating in the fiber, simulation tools provide valuable help in optimizing the design parameters. From the graphical simulations, it can be concluded that increase in the grating pitch will change the reflectivity of the interrogating wavelength. Once the sensor is simulated using the advanced simulation tools, then it is tested for its reliability. The simulation results presented in this paper show the effectiveness of the developed method, which can be further implemented in real time for various industrial applications.