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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Radio frequency polarization modulation based on an optical frequency comb.

Ruixue Zhang1, Yiming Gong1, Matthew W Day1

  • 1Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

The Review of Scientific Instruments
|September 3, 2020
PubMed
Summary

We developed a new method using optical frequency combs to create stable radio-frequency polarization modulation. This technique allows for flexible modulation frequencies, demonstrating long-term stability for advanced optical applications.

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Area of Science:

  • Photonics and Optical Engineering
  • Radio-Frequency (RF) Signal Generation
  • Quantum Optics

Background:

  • Optical frequency combs provide precise and stable light sources.
  • Radio-frequency polarization modulation is crucial for optical communication and sensing.
  • Existing methods for generating stable RF polarization modulation can be complex.

Purpose of the Study:

  • To propose and demonstrate a novel method for generating stabilized RF polarization modulation.
  • To utilize optical frequency combs for precise control over polarization states.
  • To achieve flexible and stable modulation frequencies for advanced applications.

Main Methods:

  • Generating two optical pulse trains with identical repetition rates but different offset frequencies.
  • Combining these pulse trains to create arbitrary, time-varying polarization states.
  • Employing an electrical delay line for fine-tuning polarization states and modulation.
  • Demonstrating modulation stability at frequencies of frep/2 and frep/4.

Main Results:

  • Successfully generated stabilized radio-frequency polarization modulation.
  • Achieved arbitrary polarization state generation modulated at the offset frequency difference.
  • Demonstrated long-term stability of polarization modulation at frep/2.
  • Showcased flexibility by demonstrating modulation at frep/4.

Conclusions:

  • The proposed method offers a robust and flexible approach to RF polarization modulation using optical frequency combs.
  • The technique provides stable and tunable modulation frequencies, suitable for demanding optical systems.
  • This advancement has potential applications in optical communications, sensing, and quantum information processing.