Micro-integrated laser distribution modules for low-SWaP optical atomic clocks

Quantum sensors, such as optical atomic clocks, are increasingly used in out-of-the-lab environments. This development necessitates a high degree of integration and robustness across all components of these systems. In this context, we present the status of our efforts to develop and realize compact laser distribution modules for the implementation of low-SWaP (size, weight, and power) strontium-based optical clocks. These modules are designed to control and manipulate the properties of laser light, such as frequency, phase or intensity, prior to the light’s interaction with the atoms of the clock. By integrating miniaturized free-space acousto- and electro-optic modulators into these modules, they enable applications such as laser power or fiber path length stabilization, as well as frequency-modulation spectroscopy. In this paper, we present a distribution module designed for 461 nm that was assembled using our hybrid micro-integration technology and will be integrated into a compact optical clock demonstrator. Additionally, we provide an outlook on other distribution modules currently under development.