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Related Experiment Video

Updated: Jun 17, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Radio-frequency waveform generator with time-multiplexing capabilities based on multi-wavelength pulse compression.

Víctor Torres-Company1, Lawrence R Chen

  • 1Department of Electrical and Computer Engineering, McGill University, H3A 2A7 Montreal, Quebec, Canada. victor.torrescompany@mail.mcgill.ca

Optics Express
|January 7, 2010
PubMed
Summary

We developed a novel photonic system for generating reconfigurable radio-frequency waveforms. This technology enables rapid switching between complex signals with high frequency content.

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Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

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Last Updated: Jun 17, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

  • Photonics
  • Radio-Frequency Engineering
  • Signal Processing

Background:

  • Traditional radio-frequency (RF) waveform generation faces limitations in reconfigurability and speed.
  • Photonic approaches offer potential for overcoming these limitations due to the high bandwidth of light.

Purpose of the Study:

  • To demonstrate a new method for creating a reconfigurable RF waveform generator using photonic techniques.
  • To explore the synthesis of broadband and coherent electrical signals from optical sources.

Main Methods:

  • Utilizing a multi-wavelength optical pulse source with phase modulation.
  • Employing a dispersive medium for optical pulse compression.
  • Photodetection of the resulting optical signal to generate RF waveforms.
  • Reconfiguring filter taps by adjusting optical power and wavelength separation.

Main Results:

  • Successful synthesis of a reconfigurable finite-impulse-response (FIR) filter.
  • The number of filter taps is directly related to the number of available wavelengths.
  • Demonstrated time-multiplexing of synthesized waveforms with effective switching speeds determined by the clock rate.
  • Achieved transitions between waveforms with frequency content exceeding 60 GHz in less than 100 picoseconds.

Conclusions:

  • The proposed photonically assisted system provides a flexible and high-speed solution for RF waveform generation.
  • This technique enables the creation of complex, reconfigurable RF signals with potential applications in communications and radar.
  • The system's performance is directly linked to optical source characteristics and control parameters.