[A-10] Integrated Photonic Devices

[A-10-04] Compact, Low-loss, Fabrication-tolerant, and Thermally Stable 2x2 Si Optical Coupler Designed by CMA-ES

〇Yuto Miyatake¹, Kasidit Toprasertpong¹, Shinichi Takagi¹, Mitsuru Takenaka¹ (1. Univ. of Tokyo (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.A-10-04

In this paper, we propose a 2x2 optical coupler on a Si photonic platform designed using a covariance matrix adaptation evolution strategy (CMA-ES). The optimized 2x2 coupler has a small footprint (1.5 um x 10 um), low excess loss (less than 0.03 dB), and much better fabrication tolerance and thermal stability than conventional ones. These features make the proposed coupler promising for a building block of large-scale photonic integrated circuits.