Quantum 2025 – wissenschaftliches Programm
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MON: Monday Contributed Sessions
MON 20: Quantum Sensing and Decoherence: Contributed Session to Symposium II
MON 20.1: Vortrag
Montag, 8. September 2025, 16:30–16:45, ZHG009
Ultrastable multicolor laser system with 10^-20-level frequency stability for quantum computing, sensing and timing applications — •Thomas Quenzel1, Michele Giunta1,2, Martin Wolferstetter1, Maurice Lessing1, Wolfgang Hänsel1, Michael Mei1, Marc Fischer1, and Ronald Holzwarth1,2 — 1Menlo Systems GmbH, Bunsenstraße 5, D-82152 Martinsried, Germany — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching bei München, Germany
Photonics-based quantum technologies often require ultrastable and ultralow phase noise lasers that are turn-key operated. Here we present such an ultrastable laser system with multiple wavelengths based on a continuous-wave (CW) laser referenced to an optical reference system (ORS), an optical frequency comb (OFC), and application-dependent CW lasers, supporting 20 digits of fractional stability measurements.
The ORS guarantees sub-Hz linewidth performance and fractional frequency stability of <7x10^-16 in 1 second. The OFC is based on a femtosecond fiber laser operating ~1560 nm, which is modelocked using the figure 9 technique. The stabilized CW laser serves as optical input to the OFC, and by a direct high-bandwidth phase lock the stability and narrow linewidth of this laser can be copied to every single comb line of the OFC. Finally, multiple CW lasers are locked to the corresponding comb lines extending from the UV to the Mid-IR, depending on the application. The outcome is a multicolor, ultrastable laser system, with fractional stability on the 10^-18 level in one second, and 10^-20 in 1,000 seconds.
Keywords: Frequency comb; Ultrastble laser; Photonics; Metrology; Quantum Computing