QUASENS (QUAntum SENsor with Strontium radiation)

Project partners

Menlo Systems GmbH, VACOM GmbH, QUBIG GmbH, Ferdinand-Braun-Institut gGmbH Leibniz-Institut für Höchstfrequenztechnik, Humboldt-Universität zu Berlin, Physikalisch-Technische Bundesanstalt (PTB)

Project description

The aim of the QUASENS project is to demonstrate an optical clock with a stability better than 1 x 10^-15 over several hours of averaging time, in the form of a 19" device. The QUASENS clock is based on atom interferometry using a thermal Sr atom beam.

LAYERTEC will develop mirror systems and resonator substrates for high-finesse resonators. The goal is to produce mirrors with a reflectance of R = 99.999 % (resonators with finesse 314,000) at 1542 nm and a transmission of 5 ppm. Additionally, resonators for 689 nm with a finesse of 200,000 (R = 99.9984 %, T = 5 ppm) will be developed. Together with Menlo Systems, further resonator concepts will be investigated, focusing on stability against mechanical vibrations and minimal space requirements.

LAYERTEC will also develop micro optics for the new laser diodes at 689 nm in collaboration with the Ferdinand-Braun-Institut and will work on the optics for the atom interferometer in collaboration with Humboldt-Universität.