SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 24: Integrated Photonics II (joint session Q/QI)
QI 24.4: Vortrag
Mittwoch, 8. März 2023, 17:45–18:00, A320
Lithium-niobate microcombs for dual-comb spectroscopy — •Stephan Amann1, Bingxin Xu1, Yang He2, Theodor W. Hänsch1,3, Qiang Lin2, Kerry Vahala4, and Nathalie Picque1 — 1Max Planck Institute of Quantum Optics, Garching, Germany — 2Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA — 3Faculty of Physics, Ludwig-Maximilian University of Munich, Munich, Germany — 4T.J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA
On-chip optical microresonators with a high Q-factor can generate soliton microcombs, broad spectra consisting of narrow lines with equal linespacing corresponding to the free spectral range of the resonator. Thin-film lithium niobate is a promising platform due to its large transparency window, strong second- and third-order nonlinearity and electro-optic effect. Here by driving a high-Q thin-film lithium niobate resonator with a picosecond electro-optic comb at 1.5 micron, we report stable soliton generation at a repetition rate locked by the electro-optic comb. Its high peak power grants an oscillation threshold at lower average powers than those necessary with continuous-wave pumping. The microcombs with a line spacing of 100GHz are well suited for spectroscopy in the condensed matter, where the linewidths of absorption features are often of the order of several hundreds of GHz. Dual-comb spectroscopy will leverage the time-domain interference of two microcombs to measure broad spectra within short measurement times.