Kavli Affiliate: Dimitri Mawet
| Summary:
This thesis work presents the conceptual design and experimental characterization of the Photonic Lantern Nuller instrument, which uses a multimode-to-single-mode demultiplexing waveguide to cancel out starlight while maintaining planet light, allowing for the direct characterization of planets at a telescope’s diffraction limit. The PLN was experimentally characterized in the lab, where it was further enhanced using common-path wavefront sensing and control techniques, and then demonstrated on sky at the Subaru Telescope. Highlights include measured in-lab null-depths of $sim 10^-4$ in three out of four ports simultaneously and on-sky null-depths of approximately $sim 10^-1$ (limited by jitter and atmospheric residuals). We provide an overview of these results and discuss avenues for future work.
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