Silicon Photonics-based Heterodyne Interferometric Imager for free-space imaging
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arXiv
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| Hauptverfasser: | , , , , , , , , |
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| Format: | Preprint |
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2026
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| author | Chen, Humphry Fu, Mingye Lee, Shun-Hung Timothy, Shelbe Shing, Lawrence Vasudevan, Gopal Kowalczyk, Tony Hurlburt, Neal Yoo, Sung-Joo Ben |
| author_facet | Chen, Humphry Fu, Mingye Lee, Shun-Hung Timothy, Shelbe Shing, Lawrence Vasudevan, Gopal Kowalczyk, Tony Hurlburt, Neal Yoo, Sung-Joo Ben |
| contents | This paper reports on the design, fabrication, and demonstration of a silicon photonics based heterodyne interferometric imaging system. The photonic integrated circuit (PIC) can perform one-dimensional spectroscopy for unique input spectrums using a single baseline within its 91 available baselines. The PIC uses polarization diversifying gratings to separate incoming light into two distinct polarizations, an on-chip 2x4 optical hybrid, and a strong local oscillator (LO) to perform the heterodyne measurements. The optical hybrids combine the input signals with the LO and splitting them into 2 components pairs for phase sensitive measurements. Furthermore, the PIC can perform 2-D image reconstruction by combining many baseline pairs to measure the visibility of a simple target. These demonstrations show the PIC's capabilities for 1-D spectroscopy and 2-D imaging applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_03468 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Silicon Photonics-based Heterodyne Interferometric Imager for free-space imaging Chen, Humphry Fu, Mingye Lee, Shun-Hung Timothy, Shelbe Shing, Lawrence Vasudevan, Gopal Kowalczyk, Tony Hurlburt, Neal Yoo, Sung-Joo Ben Optics Instrumentation and Methods for Astrophysics This paper reports on the design, fabrication, and demonstration of a silicon photonics based heterodyne interferometric imaging system. The photonic integrated circuit (PIC) can perform one-dimensional spectroscopy for unique input spectrums using a single baseline within its 91 available baselines. The PIC uses polarization diversifying gratings to separate incoming light into two distinct polarizations, an on-chip 2x4 optical hybrid, and a strong local oscillator (LO) to perform the heterodyne measurements. The optical hybrids combine the input signals with the LO and splitting them into 2 components pairs for phase sensitive measurements. Furthermore, the PIC can perform 2-D image reconstruction by combining many baseline pairs to measure the visibility of a simple target. These demonstrations show the PIC's capabilities for 1-D spectroscopy and 2-D imaging applications. |
| title | Silicon Photonics-based Heterodyne Interferometric Imager for free-space imaging |
| topic | Optics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2604.03468 |