In this report, a simulation method with an example of optimization and tolerance analysis for an exit pupil expander (EPE) system using 2D grating as out-coupler has been proposed and demonstrated. In this design process, the first step is to establish a simulation workflow to dynamically link a raytracing engine and a rigorous coupled wave analysis (RCWA) solver. The RCWA solver, provided by Ansys Lumerical, can accurately calculate optical response of grating in the EPE system by solving Maxwell’s equations. The raytracing engine, provided by Ansys Zemax OpticStudio, is used to evaluate the whole system’s performance, such as efficiency and uniformity. In this step, the strategy of caching and interpolating the data when linking the RCWA solver and the ray-tracing engine is the key to make the simulation process streamlined and efficient. The second step is to prepare the system for optimization and tolerance analysis. A parametric model of the grating is first constructed. The parameters of this grating model are further considered as a function of position on the waveguide, which means the grating shape varies at different positions. The coefficients of this function are then used as variables during optimization and tolerance analysis by Ansys optiSLang. In this step, the spatial uniformity and the efficiency on the eye box are optimized, and the effect of the imperfect grating geometry and material are investigated.
Despite tremendous progress in the integrated photonics ecosystem over recent years, and the commercial success of many products, there remain some important challenges and opportunities. We discuss some of the key simulation challenges related to the design, simulation, and optimization of advanced components such as lasers, isolators, and novel passive components created with photonic inverse design methods. We also discuss system level simulation challenges such as handling spatial correlations when performing statistical analysis and dealing with thermal management.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.