Digital holography with microcombs

¹ Max Planck Institute of Quantum Optics, DE-85748 Garching, Germany
² Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA
³ CIC nanoGUNE BRTA, 20018 Donostia-San Sebastián, Basque Country, Spain
⁴ Faculty of Physics, Ludwig-Maximilian University of Munich, DE-80539 Munich, Germany
⁵ T.J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA

^* Corresponding author: stephan.amann@mpq.mpg.de

Published online: 18 October 2023

Abstract

Optical microresonators are attractive comb sources due to their small form factor and stable broad optical spectra. We report on the first demonstration of microcomb-based digital holography. The large line spacing of microcombs promises an unprecedented combination of precision, fast update rate and ambiguity ranges on the scale of a few mm. Using a pulse-driven lithium niobate microcomb of 100 GHz line spacing and a scanning Michelson interferometer, we generate spectral hypercubes of holograms. Our first experimental results show that the amplitude and phase information of the object can be recovered for more than 100 comb lines.