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Method for the generation of microwave frequency combs based on a Vernier optoelectronic feedback loop
Optics Express
|November 13, 2020
Summary
This study introduces a new photonics-assisted method for generating microwave frequency combs (MFCs). The novel technique achieves flexible tuning and low phase noise, crucial for advanced applications.
Area of Science:
- Optoelectronics
- Microwave Photonics
Background:
- Traditional electronic signal sources struggle with high frequency and phase noise limitations.
- Photonics-assisted methods offer a solution for generating high-frequency, low-phase-noise microwave signals.
Purpose of the Study:
- To develop a novel photonics-assisted method for generating microwave frequency combs (MFCs).
- To achieve flexible tunability and low phase noise in MFC generation.
Main Methods:
- Utilized an optoelectronic feedback loop with a Vernier configuration for MFC generation.
- Demonstrated a dual-path Vernier optoelectronic feedback loop in a proof-of-principle experiment.
Main Results:
- Achieved self-sustained oscillation, inherent multiple-mode oscillation, and low phase noise.
- Demonstrated comb spacing tuning from 3.072 to 4.710 GHz.
- Obtained a single sideband phase noise of -99.60 dBc/Hz at 10 kHz offset.
Conclusions:
- The proposed photonics-assisted MFC generation method is effective for producing high-performance microwave signals.
- The Vernier configuration enables flexible tuning and low phase noise, meeting application demands.
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