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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.9: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
An ultra-stable resonator with a fundamental instability of 3× 10−17 — •Steffen Sauer1, Sebastian Häfner2, Dominika Fim1, Nandan Jha1, Waldemar Friesen-Piepenbrink1, Klaus Zipfel1, Thomas Legero2, Wolfgang Ertmer1, Uwe Sterr2, and Ernst Rasel1 — 1Institut für Quantenoptik, Hannover, Deutschland — 2Physikalisch-Technische Bundesanstalt, Braunschweig, Deutschland
Most of today’s accurate and stable optical clocks are limited by the so-called Dick noise, where the coherence length of the interrogation laser plays the decisive role. Therefore we are setting up a new 48 cm ULE resonator at room-temperature with crystalline mirror coatings 1 at 1550 nm. We expect a fundamental instability, caused by the Brownian motion in the material, of 3× 10−17, which is comparable to the most stable resonators in the world today.
After the construction and characterization against the single-crystal silicon resonators at PTB 2 , the ultra-stable resonator is to be used as ultra-stable local oscillator for the magnesium lattice clock at IQ, Hannover. The stability will be transmitted via a femtosecond fiber comb to the interrogation laser at 916 nm which currently operates with an instability of 4× 10−16 in 1 s. On this poster we report on the progress and characterization of our ultra-stable local oscillator. This work has received funding under Germany’s Excellence Strategy-EXC-2123/1 (No-dqQuantumFrontiersNo-dq).
1 Cole et al., Nature Photonics 7, 644-650 (2013)
2 Matei et al., Phys. Rev. Lett. 118, 263202 (2017)