Active isolator development of ultra-stable narrow linewidth laser of atomic clock

摘要

In order to meet the g-level vibration isolation requirement of the narrow linewidth laser, which is one key component in high-precision time-frequency scientific experiments, a high-performance active vibration isolation system needs to be designed. This paper synthetically adopts the magnetic sus-pension based active vibration isolation technology, and propose a new active vibration isolation method. The active vibration isolation as well as the position and attitude control are realized by eight voice coil actuators between the ultra-quiet platform and the base. In this paper, the design of the vibration isolation platform, dynamics model, dual-loop coupling control scheme and simulation results are provided sequentially. The simulation results show that after the active vibration isolation control, the 4mg micro-vibration level in the space station is attenuated to 5g, and the vibration isolation capability is 58dB, which meets the requirements of narrow linewidth laser isolation.