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Chip-scale high-performance photonic microwave oscillator.

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  • 1hQphotonics Inc., 2500 E Colorado Blvd Suite 330, Pasadena CA 91107, USA.

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Chip-scale photonic microwave oscillators achieve record-low phase noise using integrated electro-optical frequency division. This miniaturized technology offers high spectral purity for advanced applications.

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Area of Science:

  • Photonics and Optics
  • Integrated Photonics
  • Microwave Engineering

Background:

  • Optical frequency division offers high spectral purity for microwave oscillators.
  • Miniaturization of these oscillators without compromising phase noise is a key challenge.
  • Existing solutions often rely on bulk or fiber optics, limiting integration.

Purpose of the Study:

  • To develop a miniaturized, chip-scale photonic microwave oscillator.
  • To achieve high performance, particularly low phase noise, in an integrated platform.
  • To leverage integrated electro-optical frequency division for optical-to-microwave conversion.

Main Methods:

  • Utilized dual distributed-feedback lasers co-self-injection locked to a silicon nitride spiral resonator for an on-chip optical reference.
  • Employed an integrated electro-optical frequency comb on a thin-film lithium niobate phase modulator chip.
  • Implemented optical-to-microwave frequency division on a single chip.

Main Results:

  • Demonstrated a record-high-stability, fully on-chip optical reference.
  • Achieved a record-low phase noise for a chip-scale photonic microwave oscillator.
  • Successfully integrated key components for photonic microwave generation.

Conclusions:

  • This work presents a significant advancement in high-performance integrated photonic microwave oscillators.
  • The developed chip-scale oscillator paves the way for miniaturized, high-purity microwave signal generation.
  • Potential applications include advanced signal processing, radar systems, precise timing, and coherent communications.