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Q: Fachverband Quantenoptik und Photonik
Q 74: Photonics II
Q 74.4: Vortrag
Freitag, 14. März 2025, 15:15–15:30, HS Botanik
Microcombs for Hyperspectral Holographic Imaging — •Stephan Amann1,2, Edoardo Vicentini2,3, Bingxin Xu1,2, Chao Xiang4, Yang He5, Qiang Lin5, John Bowers4, Theodor Hänsch2, Kerry Vahala6, and Nathalie Picque1,2 — 1Max-Born Institute, Berlin, Germany — 2Max-Planck Institute of Quantum Optics, Garching, Germany — 3CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain — 4Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA, USA — 5Department of Electrical and Computer Engineering, University of Rochester, NY, USA — 6T.J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA, USA
Microcombs are broad optical spectra consisting of phase-coherent narrow laser lines, which are conveniently generated in high-Q optical microresonators. Due to their high coherence, broad optical bandwidth, and small footprint, microcombs have become attractive for applications such as low-noise microwave generation, optical communication and optical ranging. Digital holography is an interferometric imaging technique that gives access to both the amplitude and phase information of an object. The phase describes the three-dimensional profile of the object, while the amplitude encodes the absorption properties of the sample. By using a microcomb of 1 THz line spacing we can access the broad absorption features of condensed phase samples, measured at the comb line positions. This enables three-dimensional hyperspectral imaging and allows to discriminate the spectral properties of different plastic samples.
Keywords: Microcomb; Integrated photonics; Frequency comb; Digital holography; Hyperspectral imaging