Sub-Rayleigh imaging enhanced by phase-locked inversion interferometry
Year: 2025
Authors: Aiello R., Sgobba F., Maddaloni P., Di Lena F., Amato L.S.
Autors Affiliation: CNR, Ist Nazl Ott Applicata, Via Campi Flegrei 34, I-80078 Pozzuoli, Italy; Agenzia Spaziale Italiana, Matera Space Ctr, Contrada Terlecchia snc, I-75100 Matera, Italy.
Abstract: Super localization by image inversion interferometry (SLIVER) has recently been implemented to measure the separation of two incoherent point-like sources with promising results. The very few experimental SLIVER demonstrations suffer from the instability of the interferometer adopted. Here we set up an inversion interferometer and eliminate the instability by employing a smart locking scheme. Then we employ the developed system to perform measurement of transverse separation and intensity ratio of two simulated incoherent point-like sources. The implementation of the inversion interferometer locking, on the one hand, improves performance, and on the other hand, makes the system stable, paving the way for real observation campaigns. Using information theory, we insert the work in a rigorous framework to calculate the resolution improvement of our setup when compared with direct imaging. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Journal/Review: OPTICS EXPRESS
Volume: 33 (21) Pages from: 44834 to: 44842
More Information: Ministero dell’Universita e della Ricerca (QUEXO 2022NZP4T3) ; Consumer Programme (NQSTI P.E. 04-PE 0023 CUP B53C22004180005) .KeyWords: Information theory; Interferometers; Locks (fasteners)DOI: 10.1364/OE.558457
