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An optical-frequency synthesizer using integrated photonics.

Daryl T Spencer1, Tara Drake2, Travis C Briles2,3

  • 1Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, USA. daryl.spencer@nist.gov.

Nature
|April 27, 2018
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Summary
This summary is machine-generated.

We developed a compact optical-frequency synthesizer using integrated photonics. This device precisely controls light frequency, making advanced optical tools more accessible and affordable.

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Area of Science:

  • Photonics
  • Quantum Optics
  • Metrology

Background:

  • Optical-frequency synthesizers are crucial for advanced science but are currently large, power-hungry, and expensive.
  • Integrated photonics offers a path to miniaturize and reduce the cost of complex optical systems.

Purpose of the Study:

  • To develop a compact, low-cost, and efficient optical-frequency synthesizer using integrated photonics.
  • To demonstrate a phase-coherent microwave-to-optical link on a microchip.

Main Methods:

  • Utilized a heterogeneously integrated III-V/silicon tunable laser.
  • Employed nonlinear frequency combs fabricated on silicon chips.
  • Pumping was achieved using off-chip lasers.

Main Results:

  • Achieved programmable laser frequency output across 4 THz near 1550 nm with 1 Hz resolution.
  • Demonstrated exceptional frequency stability with a synthesis error of 7.7 × 10⁻¹⁵.
  • The system leverages integrated photonics for a phase-coherent microwave-to-optical link.

Conclusions:

  • This integrated photonics approach significantly reduces the size, power, and cost of optical-frequency synthesizers.
  • The developed technology enables wider adoption of high-precision optical frequency sources in various scientific and metrology applications.
  • High-volume semiconductor manufacturing can facilitate the widespread use of these compact devices.