Atomic clocks enable a wide range of technologies that rely on stable and precise timing, like e.g. Global Navigation Satellite System (GNSS), telecommunication and high-speed mobile networks (4G), electricity distribution network (Smart Grid). Banks also need very accurate clocks to guarantee the time and date stamps of high-frequency transactions with microsecond accuracy.
Atomic clocks are complex devices that rely on the quantum nature of atoms to produce a stable frequency source and precise timing. In this context, the system division at CSEM offers unique competencies and decades of hands-on experience. Currently, the focus of our development resides in the miniaturization of atomic clocks for hand-held devices. We aim at producing a stable frequency reference compatible with battery operation, mass production and low cost. To achieve this, we chose an atomic interrogation scheme compatible with low power consumption, developed a dedicated ASIC, fabricated miniature functionalized cells, and designed different physical packages architectures. This development is performed partially on ESA project (C-MAC), in partnership with industry, and on own funding. Having a good quality local oscillator is expected to improve the performance of GNSS receivers (speed of signal acquisition, positioning accuracy, safety) and of telecommunication networks.
