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Updated: Apr 4, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Invited Article: A compact optically coherent fiber frequency comb.

L C Sinclair1, J-D Deschênes1, L Sonderhouse1

  • 1National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80303, USA.

The Review of Scientific Instruments
|September 3, 2015
PubMed
Summary
This summary is machine-generated.

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We developed a robust, self-referenced optical frequency comb for diverse applications. Its digital control ensures over 90 hours of phase-coherent operation, a critical advancement for precise timekeeping and beyond the lab.

Area of Science:

  • * Physics and Optics
  • * Optical Engineering
  • * Metrology

Background:

  • * Optical frequency combs are essential tools for high-precision measurements.
  • * Previous systems often lacked robustness and long-term phase coherence.
  • * Self-referenced designs are crucial for simplifying complex frequency comb systems.

Purpose of the Study:

  • * To design, fabricate, and characterize a robust, self-referenced, optically coherent frequency comb.
  • * To demonstrate long-term phase-coherent operation for demanding applications.
  • * To enable wider adoption of frequency comb technology outside traditional laboratory settings.

Main Methods:

  • * Utilized a polarization-maintaining fiber optics package for enhanced system stability.

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  • * Employed saturable absorbers for reliable mode-locking.
  • * Implemented high signal-to-noise ratio (SNR) detection and digital feedback control for frequency stabilization.
  • Main Results:

    • * Achieved an octave-spanning spectrum from 1-2 μm with a pulse repetition rate of ~200 MHz.
    • * Demonstrated residual pulse-to-pulse timing jitter <3 fs, meeting key application requirements.
    • * Enabled phase-coherent operation exceeding 90 hours, limited only by fundamental SNR limits.

    Conclusions:

    • * The developed frequency comb offers exceptional robustness and long-term phase coherence.
    • * Digital control is key to achieving extended, phase-slip-free operation.
    • * The compact, laptop-sized design facilitates a broad range of practical applications.