Compact and efficient spot-size converter and design method thereof

摘要: The invention provides a compact and efficient spot-size converter design method thereof. comprises the following steps of firstly, dividing linear tapered transformation structure with length L into fewer segments arranged at equal intervals; then, optimizing width each segment by progressive optimization instead traditional genetic algorithm; more on basis that are optimized, continuing to optimize until high conversion efficiency is obtained, therefore, compared algorithm, greatly improves efficiency. After used, under condition has same efficiency, an existing reduced 20 microns from 150 microns, so integration level chip further improved.