Research on high-precision astronomical spectral calibration light source system and remote-control technology

Abstract

Fiber femtosecond optical frequency combs (OFCs) play a crucial role in achieving high-precision astronomical spectral calibration in the field of astronomy. However, OFCs generated by lasers are susceptible to disturbances from environmental factors and internal vibrations, leading to frequency drift and decreased stability. To address these, we develop a closed-loop servo control system utilizing error signals between the OFC and microwave frequency reference to stabilize the frequency. Then we design a remote-control component of the system, enabling real-time monitoring and precise control of the OFC. The results demonstrate that the system we designed not only achieves precise synchronization of the OFC’s carrier-envelope offset frequency with the microwave frequency reference, but also maintains long-term stability of the OFC, facilitating further advancements in high-precision astronomical spectral calibration light sources.

Keywords

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Tianjin University of Technology