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首页> 外文期刊>Journal of the Korean Physical Society >Theoretical analysis of simultaneously improving the light coupling efficiency and bandwidth between two separated grating couplers using integrated distributed Bragg reflectors
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Theoretical analysis of simultaneously improving the light coupling efficiency and bandwidth between two separated grating couplers using integrated distributed Bragg reflectors

机译：使用集成分布式布拉格反射器同时提高两个分离光栅耦合器之间的光耦合效率和带宽的理论分析

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摘要

A pair of identical grating couplers can be used to transmit/receive optical signals between vertically separated optical waveguides. We propose a silicon-based grating coupler with an integrated distributed Bragg reflector (DBR) to improve the light coupling bandwidth and efficiency. The optimized grating coupler structure and DBR position were developed using the finite-difference time-domain method. We numerically analyzed the coupling efficiency and bandwidth performance, and the proposed grating coupler structure achieved a theoretical peak coupling efficiency of 0.824 and a 1 dB bandwidth of 157.2 nm at close to 1550 nm, both of which represent improvements of more than two-fold compared with those of conventional grating couplers without a DBR layer.
机译：一对相同的光栅耦合器可用于在垂直分离的光波导之间传输/接收光学信号。 我们提出了一种基于硅基光栅耦合器，具有集成的分布式布拉格反射器（DBR），以提高光耦合带宽和效率。 使用有限差分时域法开发优化的光栅耦合器结构和DBR位置。 我们在数值上分析了耦合效率和带宽性能，并且所提出的光栅耦合器结构实现了0.824的理论峰值耦合效率为0.824，并且在接近1550nm的157.2nm的1 dB带宽，两者都表示比较超过两倍的改进 与没有DBR层的传统光栅耦合器的那些。

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