Abstract
Taking advantage of optical birefringence is a promising method for manufacturing many useful devices. However, due to the multiple causes of birefringence or the large size of the birefringent devices, the numerical simulation of equal-ratio-size birefringent devices is highly inefficient. In this paper, a new method for improving the calculation efficiency of birefringent model based on equivalent matrix and modified permittivity is proposed. By calculating the equivalent matrix with scaling factor a and then modifying the permittivity, complex and large size structures are equivalent to a simple model in the simulation software. Considering the power transmittance and the authenticity of the model, the value range of a has been fully discussed. With the proposed method, simulation time and memory requirement are greatly optimized in proportion to a. We use fiber optics current sensor as an example to verify our model, and the numerical results are in close agreement with the analytical calculation.
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