Calibration techniques for high angular resolution measurement with photonic lanterns on Subaru/SCExAO
Achieving high angular resolution in the visible and near-infrared is crucial for many subfields of astronomy. However, imaging resolution is typically limited to lambda/D for a single telescope. Recently, the use of photonic lanterns (PLs) for high angular resolution applications has gained interest due to their potential for super-resolution (sub-diffraction limit) capabilities. A PL can be used as a high-throughput compact integral field unit (IFU) when its single-mode outputs are fed into a diffraction-limited spectrograph. However, the sensitivity of the PLs to small angular scales makes them susceptible not only to the astronomical scene but also to static and time-varying wavefront errors, necessitating dedicated observation strategies and post-processing techniques for calibration. We present lessons learned with on-sky tests with a three-port infrared PL and a 19-port visible PL installed on the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) testbed at the Subaru Telescope, isolating spatially resolved astronomical signals from wavefront errors using spectral-differential techniques and reconstructing spectral-differential images.
Authors
- Sergio G. Leon-Saval (ORCID: https://orcid.org/0000-0002-5606-3874)
- Adam Taras
- Jonathan Lin (ORCID: https://orcid.org/0000-0002-7484-2521)
- Stephanos Yerolatsitis (ORCID: https://orcid.org/0000-0002-6268-3674)
- Yoo Jung Kim (ORCID: https://orcid.org/0000-0003-1392-0845)
- Elsa Huby (ORCID: https://orcid.org/0000-0002-1342-2822)
- Olivier Guyon (ORCID: https://orcid.org/0000-0002-1097-9908)
- Manon Lallement (ORCID: https://orcid.org/0009-0002-0929-0588)
- Steph Sallum (ORCID: https://orcid.org/0000-0001-6871-6775)
- Barnaby Norris (ORCID: https://orcid.org/0000-0002-8352-7515)
- Yinzi Xin (ORCID: https://orcid.org/0000-0002-6171-9081)
- Sébastien Vievard (ORCID: https://orcid.org/0000-0003-4018-2569)
- Vincent Déo (ORCID: https://orcid.org/0000-0003-4514-7906)
- Michael P. Fitzgerald (ORCID: https://orcid.org/0000-0002-0176-8973)
- Miles Lucas (ORCID: https://orcid.org/0000-0001-6341-310X)
- Nemanja Jovanovic (ORCID: https://orcid.org/0000-0002-3205-8392)
- Julien Lozi
- Sylvestre Lacour
- Rodrigo Amezcua-Correa
Institutions
- University of Central Florida (US)
- California Institute of Technology (US)
- The University of Sydney (AU)
- University of California, Santa Cruz (US)
- University of Hawaii–West Oahu (US)
- Laboratoire d’études spatiales et d’instrumentation en astrophysique (FR)
Publication Details
- Published
- 2025-09-18
- DOI
- https://doi.org/10.1117/12.3065031
- Primary Topic
- Adaptive optics and wavefront sensing
- Type
- article
- Field-Weighted Citation Impact
- 0.00