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Related Experiment Video

Updated: May 19, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

95 GHz millimeter wave signal generation using an arrayed waveguide grating dual wavelength semiconductor laser.

Guillermo Carpintero1, Efthymios Rouvalis, Katarzyna Ławniczuk

  • 1Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Madrid, Spain. guiller@ing.uc3m.es

Optics Letters
|September 4, 2012
PubMed
Summary

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Researchers created a 95 GHz carrier frequency using a novel photonic integrated circuit. This dual-wavelength laser source achieves the narrowest radio frequency linewidth to date, enabling compact and cost-effective heterodyne signal generation.

Area of Science:

  • Photonics
  • Integrated Optics
  • Semiconductor Lasers

Background:

  • Optical heterodyning enables radio frequency (RF) signal generation.
  • Arrayed waveguide gratings (AWGs) are key components in multiwavelength lasers.
  • Achieving narrow RF linewidths is crucial for high-performance RF photonic systems.

Purpose of the Study:

  • To demonstrate a 95 GHz carrier frequency generation using optical heterodyning.
  • To achieve the narrowest RF linewidth from a free-running dual-wavelength semiconductor laser.
  • To develop a compact, low-cost photonic integrated circuit for dual-wavelength heterodyne sources.

Main Methods:

  • Utilizing an arrayed waveguide grating-based multiwavelength laser with an extended cavity.
  • Employing optical heterodyning of two wavelengths from adjacent channels.

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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Last Updated: May 19, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

  • Leveraging the intracavity filter effect of the AWG for linewidth enhancement.

    • Main Results:

    • Successfully generated a 95 GHz carrier frequency.
    • Achieved a -3 dB RF beat note linewidth of 250 kHz.
    • Demonstrated the narrowest RF linewidth for a free-running dual-wavelength semiconductor laser.

    Conclusions:

    • The developed photonic integrated circuit offers a novel approach for compact, low-cost dual-wavelength heterodyne sources.
    • The extended cavity and AWG filter effect contribute to low phase noise and narrow optical linewidth.
    • This technology advances RF photonic applications requiring high-quality, integrated signal generation.