Design of an FPGA-Based Acetylene Laser Frequency Stabilization System
DOI:
https://doi.org/10.54097/kb9msq29Keywords:
Laser frequency stabilization, FPGA, Digital lock-in amplification, PID controlAbstract
Laser frequency stability is a core performance metric in precision optical measurement and optical communication systems. This paper presents the design and implementation of an active frequency stabilization system for a 1542 nm laser based on the absorption spectrum of acetylene molecules. With a field-programmable gate array (FPGA) as the core control unit, the system integrates the optical module, signal conditioning and conversion circuits, and a low-noise laser driving and temperature control circuit, enabling the integrated operation of modulation, phase detection, and feedback control. At the hardware level, a differential signal architecture and low-noise filtering design are adopted to effectively suppress environmental noise and electromagnetic interference.
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