Interferometric, modulation-free laser stabilization
作者： N. P. Robins , B. J. J. Slagmolen , D. A. Shaddock , J. D. Close , M. B. Gray
DOI: 10.1364/OL.27.001905
关键词:
摘要: We demonstrate novel modulation-free frequency locking of a diode laser, utilizing simple Sagnac interferometer to create an error signal from saturated-absorption spectroscopy. The interference condition at the output is strongly affected by sharp dispersion feature near atomic resonance. Slight misalignment and subsequent spatially selective, or tilt, detection allows this phase change be converted into signal. Tilt has significant advantages over previously described methods, as it requires only small number low-cost optical components detector. In addition, system potential constructed plug-and-play fiber-coupled monolithic device provide submegahertz stability for lasers in commercial market.
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