Accuracy of optical frequency comb generators and optical frequency interval divider chains.

Area of Science:

• Metrology
• Quantum Optics
• Laser Physics

Background:

• Accurate measurement of large optical frequency differences is crucial for various scientific applications.
• Traditional methods face limitations in precision and range for optical frequencies.

Purpose of the Study:

• To compare the accuracy of two distinct methods for measuring large optical frequency differences.
• To validate the performance of an optical frequency comb generator and an optical frequency interval divider chain.

Main Methods:

• Utilized an optical frequency comb generator to create numerous sidebands from a single-mode laser via electro-optic modulation.
• Employed an optical frequency interval divider chain to successively divide a frequency gap for radio-frequency counter accessibility.
• Locked two diode lasers to comb generator sidebands (~1 THz apart) and measured the interval using the divider chain.

Main Results:

• Demonstrated the accuracy of both the optical frequency comb generator and the optical frequency interval divider chain.
• Achieved a high level of accuracy within an experimental limit of 6.8 x 10(-15).
• This marks the first known experimental validation of these techniques for large optical frequency differences.

Conclusions:

• Both optical frequency comb generators and optical frequency interval divider chains are accurate methods for measuring large optical frequency differences.
• The validated techniques offer significant advancements in precision metrology.
• Future research can leverage these methods for enhanced optical frequency measurements.