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Accurate laser frequency locking to optical frequency combs under low-signal-to-noise-ratio conditions
1LNE-SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, 61 avenue de l'Observatoire, 75014 Paris, France.
The Review of Scientific Instruments
|April 9, 2020
Summary
We developed a new laser frequency locking method for optical frequency combs, achieving high accuracy even with low signal-to-noise ratios. This technique enhances comb usability and precision for applications like optical lattice clocks.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Metrology and Measurement Science
Background:
- Accurate laser frequency control is crucial for advanced applications.
- Existing methods struggle with low signal-to-noise ratios (SNR).
- Optical frequency combs (OFCs) offer broad wavelength ranges but require precise stabilization.
Purpose of the Study:
- To present a novel method for precise laser frequency locking to an OFC.
- To address limitations of current techniques in low SNR environments.
- To improve the accuracy and extend the utility of OFCs.
Main Methods:
- Demonstration of a new frequency locking technique.
- Application to the frequency control of a dipole lattice trap.
- Comparison with conventional wavemeter accuracy.
Main Results:
- Achieved accurate laser frequency locking under low SNR conditions, surpassing other methods.
- Demonstrated orders of magnitude improvement in accuracy compared to conventional wavemeters.
- Extended the usable wavelength range of the optical frequency comb.
Conclusions:
- The developed method offers superior accuracy for laser frequency stabilization to OFCs.
- It significantly enhances the performance and applicability of optical lattice clocks.
- This technique broadens the utility of optical frequency combs in precision measurements.
