SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 27: Precision Measurements with Optical Clocks (joint session Q/QI)
QI 27.5: Vortrag
Donnerstag, 9. März 2023, 12:15–12:30, E001
Vibration isolation and frequency feedforward techniques in ultra-stable laser systems. — •Sofia Herbers1, Jialiang Yu1, Jan Kawohl1, Mattias Misera1, Thomas Legero1, Uwe Sterr1, Anders Wallin2, Kalle Hanhijärvi2, Thomas Lindvall2, and Thomas Fordell2 — 1Physikalisch-Technische Bundesanstalt (PTB), Germany — 2VTT Technical Research Center of Finland Ldt., Finland
To improve the performance of metrology and precision measurements with optical clocks, ultra-stable lasers with extremely low frequency instability are required. Amongst others, accelerations acting on the laser systems’ ultra-stable resonators limit the frequency stability even though the resonators’ acceleration sensitivity is reduced by novel mounting designs and the best commercially available vibration isolation systems are used to reduce vibrations.
To overcome this limitation, we investigate adding additional feedback corrections to a commercial vibration isolation platform as well as applying feedforward corrections to the laser frequency. Additional seismometers and a tiltmeter are placed on the vibration isolation platform to detect its movement. The sensor outputs are used to generate correction signals that are either sent back to the actuators of the vibration isolation platform or sent forward to the laser frequency.
We acknowledge support by the Project 20FUN08 NEXTLASERS, which has received funding from the EMPIR programme cofinanced by the Participating States and from the European Union*s Horizon 2020 Research and Innovation Programme.