Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design
We propose a dual-ring optical filter based on direct binary search inverse design. The proposed device comprises two cascaded rings in an add–drop configuration. A physical model was established using temporal coupled mode theory to derive theoretical spectra and analyze key parameters governing tr...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/12/7/681 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849732761950093312 |
|---|---|
| author | Yuchen Hu Tong Wang Wen Zhou Bo Hu |
| author_facet | Yuchen Hu Tong Wang Wen Zhou Bo Hu |
| author_sort | Yuchen Hu |
| collection | DOAJ |
| description | We propose a dual-ring optical filter based on direct binary search inverse design. The proposed device comprises two cascaded rings in an add–drop configuration. A physical model was established using temporal coupled mode theory to derive theoretical spectra and analyze key parameters governing transmission performance. Based on theoretical results, a direct binary search algorithm was implemented. The parameters of the proposed device were calculated using a three-dimensional finite-difference time-domain method for verification. The numerical results demonstrate a free spectral range of 86 nm, with insertion loss and extinction ratios of 0.3 dB and 22 dB, respectively. The proposed device has a narrow spectral linewidth of 0.3 nm within a compact footprint of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>24</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow><mo>×</mo><mn>25.5</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow></mrow></semantics></math></inline-formula>. The device shows significant application potential in laser external cavities and dense wavelength division multiplexing systems. Moreover, this work provides a novel methodology for precision design of photonic devices. |
| format | Article |
| id | doaj-art-5095a2091f1d42bba7a2e4d67cb56474 |
| institution | DOAJ |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-5095a2091f1d42bba7a2e4d67cb564742025-08-20T03:08:13ZengMDPI AGPhotonics2304-67322025-07-0112768110.3390/photonics12070681Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse DesignYuchen Hu0Tong Wang1Wen Zhou2Bo Hu3College of Future Information Technology, Fudan University, Shanghai 200438, ChinaCollege of Future Information Technology, Fudan University, Shanghai 200438, ChinaCollege of Future Information Technology, Fudan University, Shanghai 200438, ChinaCollege of Future Information Technology, Fudan University, Shanghai 200438, ChinaWe propose a dual-ring optical filter based on direct binary search inverse design. The proposed device comprises two cascaded rings in an add–drop configuration. A physical model was established using temporal coupled mode theory to derive theoretical spectra and analyze key parameters governing transmission performance. Based on theoretical results, a direct binary search algorithm was implemented. The parameters of the proposed device were calculated using a three-dimensional finite-difference time-domain method for verification. The numerical results demonstrate a free spectral range of 86 nm, with insertion loss and extinction ratios of 0.3 dB and 22 dB, respectively. The proposed device has a narrow spectral linewidth of 0.3 nm within a compact footprint of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>24</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow><mo>×</mo><mn>25.5</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow></mrow></semantics></math></inline-formula>. The device shows significant application potential in laser external cavities and dense wavelength division multiplexing systems. Moreover, this work provides a novel methodology for precision design of photonic devices.https://www.mdpi.com/2304-6732/12/7/681coupled mode theorydirect binary searchringphotonic integration |
| spellingShingle | Yuchen Hu Tong Wang Wen Zhou Bo Hu Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design Photonics coupled mode theory direct binary search ring photonic integration |
| title | Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design |
| title_full | Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design |
| title_fullStr | Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design |
| title_full_unstemmed | Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design |
| title_short | Creation of Low-Loss Dual-Ring Optical Filter via Temporal Coupled Mode Theory and Direct Binary Search Inverse Design |
| title_sort | creation of low loss dual ring optical filter via temporal coupled mode theory and direct binary search inverse design |
| topic | coupled mode theory direct binary search ring photonic integration |
| url | https://www.mdpi.com/2304-6732/12/7/681 |
| work_keys_str_mv | AT yuchenhu creationoflowlossdualringopticalfilterviatemporalcoupledmodetheoryanddirectbinarysearchinversedesign AT tongwang creationoflowlossdualringopticalfilterviatemporalcoupledmodetheoryanddirectbinarysearchinversedesign AT wenzhou creationoflowlossdualringopticalfilterviatemporalcoupledmodetheoryanddirectbinarysearchinversedesign AT bohu creationoflowlossdualringopticalfilterviatemporalcoupledmodetheoryanddirectbinarysearchinversedesign |