A Silicon Photonic 32-Input Coherent Combiner for Turbulence Mitigation in Free Space Optics Links
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916273293623296 |
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| author | De Marinis, Lorenzo Kincaid, Peter Seigo Lucas, Yann Krafft, Lea Michau, Vincent Cherchi, Matteo Karppinen, Mikko Contestabile, Giampiero |
| author_facet | De Marinis, Lorenzo Kincaid, Peter Seigo Lucas, Yann Krafft, Lea Michau, Vincent Cherchi, Matteo Karppinen, Mikko Contestabile, Giampiero |
| contents | A photonic integrated circuit (PIC) for the coherent combination of 32 input optical signals into a single output fiber is reported. The PIC was fabricated using a low-loss thick silicon-on-insulator (SOI) process and packaged with 32 input and 1 output fibers. The basic building block is a 2x2 Mach-Zehnder interferometer (MZI) with an external (to the MZI branches) and an internal thermal phase shifter, and a bandwidth in excess of 80 kHz. The PIC monolithically integrates 31 MZIs and 31 germanium photodetectors, and is suitable in principle for turbulence mitigation in LEO-ground and horizontal free space optics links. Improvements to the device for the coherent combination of 64 inputs and for the reduction of insertion losses are also discussed |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_02076 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Silicon Photonic 32-Input Coherent Combiner for Turbulence Mitigation in Free Space Optics Links De Marinis, Lorenzo Kincaid, Peter Seigo Lucas, Yann Krafft, Lea Michau, Vincent Cherchi, Matteo Karppinen, Mikko Contestabile, Giampiero Optics Signal Processing A photonic integrated circuit (PIC) for the coherent combination of 32 input optical signals into a single output fiber is reported. The PIC was fabricated using a low-loss thick silicon-on-insulator (SOI) process and packaged with 32 input and 1 output fibers. The basic building block is a 2x2 Mach-Zehnder interferometer (MZI) with an external (to the MZI branches) and an internal thermal phase shifter, and a bandwidth in excess of 80 kHz. The PIC monolithically integrates 31 MZIs and 31 germanium photodetectors, and is suitable in principle for turbulence mitigation in LEO-ground and horizontal free space optics links. Improvements to the device for the coherent combination of 64 inputs and for the reduction of insertion losses are also discussed |
| title | A Silicon Photonic 32-Input Coherent Combiner for Turbulence Mitigation in Free Space Optics Links |
| topic | Optics Signal Processing |
| url | https://arxiv.org/abs/2406.02076 |