Optimum design method of high-performance and wide-band optical integrated cuirts

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K11997
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 60100:Computational science-related
• Research Institution: Kitami Institute of Technology
• Principal Investigator: Yasui Takashi 北見工業大学, 工学部, 准教授 (20403438)
• Co-Investigator(Kenkyū-buntansha): 杉坂 純一郎 北見工業大学, 工学部, 准教授 (00599227)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 光集積回路 / 最適設計 / 数値解析 / ビーム伝搬法 / 有限要素法

Outline of Final Research Achievements

In this study, the following two results were achieved. First, an optimal design method based on real-coded micro-genetic algorithm for weakly-guided 4x4 multimode interference (MMI) coupler as an optical 90-degree hybrid. The results show that an optical 90-degree hybrid based on weakly-guided 4x4 MMI that satisfies tipycal system requirements can be realized. The optimization system was executed in a parallel computation system. Its parallef efficiency of an optimization process was 0.78. Second, single-mode conditions of chalcogenide glass channel waveguide for astrophonic device, which are operated in the mid-infrared spectra range, were investigated in detail. The results numericaly show that single-mode oprations across the astronomical N-band can be realized, for the fist time.

Free Research Field

光エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

1．光90度ハイブリッドは次世代の超高速光通信システムの実現に不可欠な光回路素子である．これを石英光導波路型4x4多モード干渉(MMI)カプラで実現することで，シンプルかつ安価な素子の実現が期待できるがその設計は困難であった．本研究成果によって，実用的な性能を持つそしの設計が可能であることを示した．
2．天文学の分野で光集積回路を活用した高解像度な観測が行われ始め，より高性能な光集積回路の設計の必要性が高まっている．本研究ではその設計の基本となる光導波路の伝送特性を解明した．この情報は観測天文学の発展に有益であると考えられる．