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Related Experiment Video

Updated: Jun 24, 2026

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

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All-fiber 50 W coherently combined passive laser array.

Baishi Wang1, Eric Mies, Monica Minden

  • 1Vytran, LLC, Morganville, NJ 07751, USA. bwang@vytran.com

Optics Letters
|April 3, 2009
PubMed
Summary

We achieved 50 W of spontaneously phase-locked fiber lasers using all-fiber, passive configurations. Laser cavity differences and fiber nonlinearity are key for stable, efficient coherent beam combining and power scalability.

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Area of Science:

  • Fiber laser technology
  • Photonics
  • Laser engineering

Background:

  • Coherent beam combining (CBC) is crucial for high-power fiber lasers.
  • Previous CBC methods often require active feedback or complex setups.
  • All-fiber, passive CBC offers a simpler, more scalable approach.

Purpose of the Study:

  • To demonstrate high-power, spontaneously phase-locked fiber laser arrays.
  • To investigate the critical parameters for efficient and stable CBC in an all-fiber system.
  • To explore the power scalability of the demonstrated phase-locking mechanism.

Main Methods:

  • Utilized two large-mode-area (LMA) polarization-maintaining fiber laser cavities.
  • Employed an LMA fiber coupler for beam combination.

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Last Updated: Jun 24, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

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Published on: November 22, 2019

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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  • Experimentally varied laser cavity length differences and fiber nonlinearity.
  • Compared CBC efficiency using fibers with different mode-field diameters.

    • Main Results:

    • Achieved 50 W of output power from a spontaneously phase-locked two-laser array.
    • Demonstrated that laser cavity length difference and fiber nonlinearity significantly impact CBC efficiency and stability.
    • Observed variations in CBC efficiency based on fiber mode-field diameter.

    Conclusions:

    • Spontaneously phase-locked LMA fiber laser arrays are a viable path to high-power coherent beam combining.
    • Cavity design and nonlinear fiber effects are critical for optimizing passive CBC.
    • The demonstrated approach shows potential for further power scaling.