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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Photonic chip-based low-noise microwave oscillator.

Igor Kudelin1,2, William Groman3,4, Qing-Xin Ji5

  • 1National Institute of Standards and Technology, Boulder, CO, USA. igor.kudelin@colorado.edu.

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|March 6, 2024
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Summary
This summary is machine-generated.

This study demonstrates a novel integrated photonic system for generating low-noise microwave signals. The new chip-based approach offers unprecedented phase noise performance for advanced navigation and communication systems.

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Area of Science:

  • Photonics
  • Microwave Engineering
  • Integrated Optics

Background:

  • Modern technologies require low-phase noise and stable microwave signals.
  • Current microwave photonics systems use bulk or fiber optics, limiting miniaturization and power efficiency.

Purpose of the Study:

  • To develop a compact and power-efficient integrated photonic system for low-noise microwave signal generation.
  • To overcome the limitations of bulk optics in current microwave photonic systems.

Main Methods:

  • Utilized two-point optical frequency division on a chip.
  • Stabilized narrow-linewidth lasers to a miniature Fabry-Pérot cavity.
  • Employed a dark soliton frequency comb for optical frequency division and photodetected the output.

Main Results:

  • Generated a 20 GHz microwave signal with phase noise of -96 dBc/Hz at 100 Hz offset, decreasing to -135 dBc/Hz at 10 kHz offset.
  • Achieved unprecedented phase noise performance for an integrated photonic system.
  • Demonstrated heterogeneous integration of all photonic components on a single chip.

Conclusions:

  • The developed integrated photonic system offers a significant advancement for high-precision navigation, communication, and timing.
  • This chip-scale solution paves the way for smaller, more power-efficient microwave signal generation.
  • The results highlight the potential of integrated photonics to revolutionize precision timing applications.