Frequency-Stabilized Laser Utilizing Acetylene Molecular Absorption Lines as Frequency References

Frequency-stabilized lasers, as core components in precision optical systems and communication networks, demonstrate direct correlations between their frequency stability and critical performance metrics such as optical communication capacity and spectral measurement resolution. While conventional ultra-stable optical cavity solutions achieve exceptional stability, their practical implementation faces inherent limitations due to complex temperature control requirements and vibration isolation demands, hindering cost-effective miniaturization for industrial applications. Acetylene molecules, leveraging their intrinsic absorption spectral lines in communication bands, offer novel opportunities for developing compact frequency-stabilized lasers. This paper presents a new stabilization system based on acetylene molecular absorption characteristics. Through optimized optical path design and improved feedback control architecture, effective laser frequency locking in communication bands has been achieved, providing a cost-efficient stabilization solution for applications in fiber-optic communications and quantum sensing technologies.