Design of a Rectangular Plate Optical Pressure Sensor Waveguide with Integrated Bragg Grating
نویسندگان
چکیده
This paper presents the design and simulation of a rectangular plate optical pressure sensor waveguide. The waveguide has a nano-scale Bragg grating introduced on the upper half area. The Bragg grating shows a considerable deformation, when it is subjected to tangential strain, which forms the basic sensing principal for the design. The free space wavelength of 1.55μm and Bragg spacing of 0.5μm is used. The performance of the Bragg sensor for different types of grating is also observed and compared. The maximum sensitivity counted for a pressure of 300bar was about 2.436dBm/μm. After analyzing the simulation results of types of grating, it is found that chirped fiber grating gives the better reflectivity, with maximum suppressed side lobes. The design is simulated using COMSOL Multiphysics 3.2a. KeywordsWave guide, Reflectivity, Bragg Grating, Chirped Grating, Tilted Grating. ————————————————————
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