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QI: Fachverband Quanteninformation
QI 37: Poster – Quantum Information Technologies (joint session Q/QI)
QI 37.21: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Frequency Stabilization of a Hybrid SnV-40Ca+ Interface at Telecom Wavelengths — •Tobias Bauer, David Lindler, Max Bergerhoff, Jürgen Eschner, and Christoph Becher — Universität des Saarlandes, FR Physik, Campus E2.6, 66123 Saarbrücken
In quantum networks, the synchronization of dissimilar quantum nodes requires precise frequency control and efficient wavelength conversion. We demonstrate a platform combining optical frequency comb technology with quantum frequency conversion to integrate SnV color centers in diamond and trapped 40Ca+ ions into a common telecom-wavelength framework.
Our setup employs two mutually stabilized frequency combs as precise frequency references for all system lasers at each node. We characterize the system with classical light by stabilizing the excitation lasers at the SnV (619 nm) and 40Ca+ (854 nm) system wavelengths to their respective frequency combs. These lasers are then frequency-converted to a common telecom wavelength (1550 nm) using pump lasers that are likewise referenced to the combs. The successful operation of our complete stabilization scheme is demonstrated through beat note measurements between the converted lasers at the telecom wavelength, verifying the frequency precision required for future quantum network applications.
Keywords: Quantum Frequency Conversion; Frequency Stabilization; 40Ca+; SnV; Hybrid Networks