基于光纤的1.55 $μ$ m光频率基准中由于残余干扰引起的限制
Limitations due to residual interference in a fiber-based optical frequency reference at 1.55 $μ$m
摘要：
我们提出了一个实验研究的稳定性限制特定的光学频率标准，使用光纤结构和半导体激光器。一个紧凑的设置组成的半导体激光器频率锁定到饱和吸收中检测到的乙炔跃迁已实现仅使用光纤组件。光纤技术为各种应用提供了紧凑可靠的解决方案。然而，对于高灵敏度和稳定性的应用，例如计量，由连接器和光纤耦合组件中的光学折射率不均匀性引起的残余反射导致杂散干扰，从而显著限制性能。我们已经研究了叠加在检测信号上的干涉条纹的起源以及它们对参考频率稳定性造成的限制。温度和光束功率波动的影响也进行了研究。我们的结果表明，由于使用光纤组件的干涉条纹的影响，频率稳定度被限制在10-13范围内。
英文摘要：
We present an experimental investigation of the stability limits specific to optical frequency standards using a fiber-optic architecture and semiconductor lasers. A compact setup composed of a semiconductor laser frequency-locked onto an acetylene transition detected in saturated absorption has been implemented using only fiber-optic components. Fiber optic technology allows compact and reliable solutions for various applications. However, for high sensitivity and stability applications such as metrology, residual reflections induced by optical index inhomogeneities in connectors and fiber-coupled components leading to spurious interference significantly limit performance. We have examined the origin of the interference fringes superimposed on the detected signal and the limitations they cause to the frequency stability of the reference. The effects of temperature and beam power fluctuations are also examined. Our results show that the frequency stability is limited in the 10-13 range by the effect of interference fringes due to use of fiber components.
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