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| 講演名 | 2025-10-23 11:40 Study on THz Band SWG-NRD 3-dB Wavelength-Insensitive Coupler ○Md. Iquebal Hossain Patwary・Akito Iguchi・Yasuhide Tsuji（Muroran Inst. Tech.）  EMCJ2025-45 MW2025-131 EST2025-58 |
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| 抄録 | （和） | Sub-wavelength grating NRD guide (SWG-NRD guide) can transmit single LSM01 mode even in the arbitrary bends without exciting LSE01 mode. While prior work has focused on SWG-NRD simple structures, advanced devices with arbitrary bends require further study to fully exploit this advantage. The Mach-Zehnder interferometer (MZI) based 3-dB wavelength-in- sensitive coupler (WINC) with arbitrary bends is an essential device in wavelength-division multiplexing (WDM) systems. In this study, we investigate the optimal design of SWG-NRD 3-dB MZI WINC utilizing the topology optimal matching circuit. We numerically estimate the wavelength dependence of the designed WINC and compare it with that of a conventional directional coupler (DC). The devices is efficiently analyzed by the recently established two-dimensional full-vectorial finite element method (2D-FVFEM) for NRD guide. |
| （英） | Sub-wavelength grating NRD guide (SWG-NRD guide) can transmit single LSM01 mode even in the arbitrary bends without exciting LSE01 mode. While prior work has focused on SWG-NRD simple structures, advanced devices with arbitrary bends require further study to fully exploit this advantage. The Mach-Zehnder interferometer (MZI) based 3-dB wavelength-in- sensitive coupler (WINC) with arbitrary bends is an essential device in wavelength-division multiplexing (WDM) systems. In this study, we investigate the optimal design of SWG-NRD 3-dB MZI WINC utilizing the topology optimal matching circuit. We numerically estimate the wavelength dependence of the designed WINC and compare it with that of a conventional directional coupler (DC). The devices is efficiently analyzed by the recently established two-dimensional full-vectorial finite element method (2D-FVFEM) for NRD guide. |
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| キーワード | （和） | Sub-wavelength grating NRD guide / Wavelength-insensitive coupler / Wavelength-division multiplexing / two-dimensional full-vectorial finite element method / THz band / / / |
| （英） | Sub-wavelength grating NRD guide / Wavelength-insensitive coupler / Wavelength-division multiplexing / two-dimensional full-vectorial finite element method / THz band / / / | |
| 文献情報 | 信学技報, vol. 125, no. 210, EST2025-58, pp. 34-38, 2025年10月. | |
| 資料番号 | EST2025-58 | |
| 発行日 | 2025-10-16 (EMCJ, MW, EST) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | EMCJ2025-45 MW2025-131 EST2025-58 |
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