Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters
In previous works, inverse design methods have primarily focused on manipulating the optical power to achieve specific design targets. In this paper, we use the inverse design method to enable the precise engineering of the optical phase. As a proof of concept, we present a series of phase shifters...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/9/1030 |
| _version_ | 1827724337798447104 |
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| author | Junpeng Liao Ye Tian Zhe Kang Xiaowei Zhang |
| author_facet | Junpeng Liao Ye Tian Zhe Kang Xiaowei Zhang |
| author_sort | Junpeng Liao |
| collection | DOAJ |
| description | In previous works, inverse design methods have primarily focused on manipulating the optical power to achieve specific design targets. In this paper, we use the inverse design method to enable the precise engineering of the optical phase. As a proof of concept, we present a series of phase shifters (PSs) with varying phase shifts, which are inversely designed and theoretically validated on the silicon-on-insulator (SOI) platform. The designed PSs exhibit remarkable accuracy, with deviations of below 1<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula>. These proposed PSs feature an ultra-compact footprint of 3 µm in length and offer superior fabrication tolerances compared to conventional structures. Over the 1535–1565 nm bandwidth, the discrepancy between the actual and target phase shifts remains below ±1<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula> for all phase shifters, while the insertion loss is consistently below 0.035 dB. Moreover, the feasibility of the designed five PSs is verified using 2 × 2 multimode interference couplers (MMI). |
| first_indexed | 2024-03-10T22:14:21Z |
| format | Article |
| id | doaj.art-761c37392f3e45a58417bfcbc323b48a |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T22:14:21Z |
| publishDate | 2023-09-01 |
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| series | Photonics |
| spelling | doaj.art-761c37392f3e45a58417bfcbc323b48a2023-11-19T12:30:05ZengMDPI AGPhotonics2304-67322023-09-01109103010.3390/photonics10091030Inverse Design of Ultra-Compact and Low-Loss Optical Phase ShiftersJunpeng Liao0Ye Tian1Zhe Kang2Xiaowei Zhang3Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, ChinaDepartment of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, ChinaCentre for Optical and Electromagnetic Research, College of Optical Science and Engineering, Ningbo Innovation Center, Zhejiang University, Hangzhou 310058, ChinaDepartment of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, ChinaIn previous works, inverse design methods have primarily focused on manipulating the optical power to achieve specific design targets. In this paper, we use the inverse design method to enable the precise engineering of the optical phase. As a proof of concept, we present a series of phase shifters (PSs) with varying phase shifts, which are inversely designed and theoretically validated on the silicon-on-insulator (SOI) platform. The designed PSs exhibit remarkable accuracy, with deviations of below 1<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula>. These proposed PSs feature an ultra-compact footprint of 3 µm in length and offer superior fabrication tolerances compared to conventional structures. Over the 1535–1565 nm bandwidth, the discrepancy between the actual and target phase shifts remains below ±1<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula> for all phase shifters, while the insertion loss is consistently below 0.035 dB. Moreover, the feasibility of the designed five PSs is verified using 2 × 2 multimode interference couplers (MMI).https://www.mdpi.com/2304-6732/10/9/1030silicon photonicssilicon passive devicesinverse design |
| spellingShingle | Junpeng Liao Ye Tian Zhe Kang Xiaowei Zhang Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters Photonics silicon photonics silicon passive devices inverse design |
| title | Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters |
| title_full | Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters |
| title_fullStr | Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters |
| title_full_unstemmed | Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters |
| title_short | Inverse Design of Ultra-Compact and Low-Loss Optical Phase Shifters |
| title_sort | inverse design of ultra compact and low loss optical phase shifters |
| topic | silicon photonics silicon passive devices inverse design |
| url | https://www.mdpi.com/2304-6732/10/9/1030 |
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