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Related Experiment Video

Updated: Aug 26, 2025

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Optimising microring resonator based optical frequency comb distillation for optical communications systems.

Chawaphon Prayoonyong, Bill Corcoran

    Optics Express
    |October 12, 2022
    PubMed
    Summary

    This study optimizes micro-ring resonators (MRR) for optical frequency comb noise filtering. Proper parameter tuning significantly improves the optical signal-to-noise ratio (OSNR) for comb lines.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Signal Processing

    Background:

    • Optical frequency combs (OFCs) are crucial for precise measurements and communications.
    • Amplifying OFCs often introduces broadband noise, necessitating filtering techniques.
    • Micro-ring resonators (MRRs) offer potential for filtering noise in OFC applications.

    Purpose of the Study:

    • To investigate the impact of device parameters on micro-ring resonator (MRR) performance for optical frequency comb (OFC) distillation.
    • To explore how misalignment between the OFC and MRR affects comb distillation.
    • To identify optimal MRR parameters for enhanced OFC filtering.

    Main Methods:

    • Simulated and experimental investigation of MRR performance for OFC noise filtering.

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    Last Updated: Aug 26, 2025

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  • Analysis of comb distillation efficiency under varying MRR parameters (e.g., resonance bandwidth, coupling loss).
  • Evaluation of performance with intentional misalignment in line spacing between the OFC and MRR.

    • Main Results:

    • A reduction of up to 16 dB in the required optical signal-to-noise ratio (OSNR) for comb lines was achieved.
    • The observed OSNR improvement was independent of the modulation format used.
    • Optimal performance was found with a 100 MHz resonance bandwidth and 3 dB coupling loss for the MRR.

    Conclusions:

    • Micro-ring resonator (MRR) parameter optimization is critical for effective optical frequency comb (OFC) distillation.
    • Careful selection of MRR resonance bandwidth and coupling loss can significantly enhance OFC signal quality.
    • This work provides valuable insights for designing efficient OFC noise filtering systems.