| Download | - View final version: Optical wavefront phase-tilt measurement using Si-photonic waveguide grating couplers (PDF, 2.9 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1364/OL.506013 |
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| Author | Search for: Janz, S.1; Search for: Xu, D. X.1ORCID identifier: https://orcid.org/0000-0002-0490-5224; Search for: Grinberg, Y.2; Search for: Wang, S.1; Search for: Vachon, M.1; Search for: Cheben, P.1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Schmid, J. H.1; Search for: Melati, D.ORCID identifier: https://orcid.org/0000-0002-3427-0186 |
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| Affiliation | - National Research Council of Canada. Advanced Electronics and Photonics
- National Research Council of Canada. Digital Technologies
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| Format | Text, Article |
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| Abstract | Silicon photonic wavefront phase-tilt sensors for wavefront monitoring using surface coupling grating arrays are demonstrated. The first design employs the intrinsic angle dependence of the grating coupling efficiency to determine local wavefront tilt, with a measured sensitivity of 7 dB/°. The second design connects four gratings in an interferometric waveguide circuit to determine incident wavefront phase variation across the sensor area. In this device, one fringe spacing corresponds to 2° wavefront tilt change. These sensor elements sample a wavefront incident on the chip surface without the use of bulk optic elements, fiber arrays, or imaging arrays. Both sensor elements are less than 60 µm across and are potential unit cell sensor elements for large arrays that monitor wavefront shape across an image or pupil plane in adaptive optics systems for free-space optical communications, astronomy, and beam pointing applications. |
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| Publication date | 2023-11-28 |
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| Publisher | Optica Publishing Group |
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| Copyright statement | - © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 0bfcbeff-d9de-4f68-9058-0206ea31541e |
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| Record created | 2024-02-07 |
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| Record modified | 2024-02-07 |
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