A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides
A low loss optical interconnection between optical fibers and photonic integrated circuits is critical for high performance photonic systems. In the past decade, spot size converters, subwavelength waveguide grating (SWG) structures, and different refractive index materials have been applied to allo...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/3/231 |
| _version_ | 1827747985830707200 |
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| author | Di Wu Wei Yan Yucong Yang Xiaoyi Song Zixuan Wei Jun Qin Longjiang Deng Lei Bi |
| author_facet | Di Wu Wei Yan Yucong Yang Xiaoyi Song Zixuan Wei Jun Qin Longjiang Deng Lei Bi |
| author_sort | Di Wu |
| collection | DOAJ |
| description | A low loss optical interconnection between optical fibers and photonic integrated circuits is critical for high performance photonic systems. In the past decade, spot size converters, subwavelength waveguide grating (SWG) structures, and different refractive index materials have been applied to allow efficient coupling between the fiber and the photonic chips. However, it is still challenging to achieve low-loss coupling when interfacing high index contrast waveguides such as SiN with SMF-28 fibers. In this work, we report a multilayer edge-coupler using SiO<sub>x</sub>N materials with different indices to allow for efficient edge coupling between SMF-28 fiber and SiN single mode waveguides. A coupling loss of 0.068 dB for the TM mode was achieved theoretically at a 1550 nm wavelength, with a 1 dB alignment tolerance offset of 2.4 μm. |
| first_indexed | 2024-03-11T06:00:55Z |
| format | Article |
| id | doaj.art-25ad6d289024446798a6f736e8e06d33 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T06:00:55Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-25ad6d289024446798a6f736e8e06d332023-11-17T13:18:07ZengMDPI AGPhotonics2304-67322023-02-0110323110.3390/photonics10030231A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride WaveguidesDi Wu0Wei Yan1Yucong Yang2Xiaoyi Song3Zixuan Wei4Jun Qin5Longjiang Deng6Lei Bi7National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaNational Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, ChinaA low loss optical interconnection between optical fibers and photonic integrated circuits is critical for high performance photonic systems. In the past decade, spot size converters, subwavelength waveguide grating (SWG) structures, and different refractive index materials have been applied to allow efficient coupling between the fiber and the photonic chips. However, it is still challenging to achieve low-loss coupling when interfacing high index contrast waveguides such as SiN with SMF-28 fibers. In this work, we report a multilayer edge-coupler using SiO<sub>x</sub>N materials with different indices to allow for efficient edge coupling between SMF-28 fiber and SiN single mode waveguides. A coupling loss of 0.068 dB for the TM mode was achieved theoretically at a 1550 nm wavelength, with a 1 dB alignment tolerance offset of 2.4 μm.https://www.mdpi.com/2304-6732/10/3/231edge couplerSMF-28silicon nitridesilicon photonics |
| spellingShingle | Di Wu Wei Yan Yucong Yang Xiaoyi Song Zixuan Wei Jun Qin Longjiang Deng Lei Bi A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides Photonics edge coupler SMF-28 silicon nitride silicon photonics |
| title | A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides |
| title_full | A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides |
| title_fullStr | A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides |
| title_full_unstemmed | A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides |
| title_short | A Theoretical Sub-0.1 dB Loss Single Mode Fiber-To-Chip Edge Coupler for Silicon Nitride Waveguides |
| title_sort | theoretical sub 0 1 db loss single mode fiber to chip edge coupler for silicon nitride waveguides |
| topic | edge coupler SMF-28 silicon nitride silicon photonics |
| url | https://www.mdpi.com/2304-6732/10/3/231 |
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