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Milliwatt-threshold visible-telecom optical parametric oscillation using silicon nanophotonics.

Xiyuan Lu1,2, Gregory Moille1,2, Anshuman Singh1,2

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Summary

Researchers developed a novel silicon nanophotonics method for on-chip visible light generation. This widely-separated optical parametric oscillation (OPO) offers high power efficiency and stability for spectroscopy and metrology applications.

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Area of Science:

  • Photonics
  • Nanotechnology
  • Quantum Optics

Background:

  • On-chip generation of visible coherent light is essential for portable spectroscopy and metrology.
  • Existing on-chip laser solutions are limited by specific gain media.
  • A general, adaptable method for visible light generation is needed.

Purpose of the Study:

  • To propose and demonstrate a novel method for on-chip visible light generation using silicon nanophotonics.
  • To achieve widely-separated optical parametric oscillation (OPO) for visible light production.
  • To overcome limitations of current on-chip light sources.

Main Methods:

  • Utilized silicon nanophotonics to implement widely-separated optical parametric oscillation (OPO).
  • Employed a 900 nm infrared pump to generate signal (700 nm) and idler (1300 nm) light.
  • Investigated device design modifications for generating 780 nm and 1500 nm light.

Main Results:

  • Achieved OPO with a low threshold power of (0.9 ± 0.1) mW, over 50x lower than previous microcavity OPO.
  • Demonstrated efficient generation of visible light (700 nm band) from an infrared pump.
  • Showcased high power efficiency, operational stability, and device scalability.

Conclusions:

  • The nanophotonic OPO provides a flexible and efficient solution for on-chip visible light generation.
  • This technology advances the development of compact spectroscopy and metrology systems.
  • The proposed method offers significant advantages over existing on-chip laser technologies.