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Updated: Jun 5, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Phase locking a fiber laser array via diffractive coupling.

Eitan Ronen1, Amiel A Ishaaya

  • 1Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel. ronenei@bgu.ac.il

Optics Express
|January 26, 2011
PubMed
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Researchers achieved phase locking in seven fiber lasers using diffractive coupling. This method enhances total output power and demonstrates anti-phase locking, though scalability is limited by phase decorrelation.

Area of Science:

  • Photonics
  • Laser Physics
  • Optical Engineering

Background:

  • Fiber laser arrays offer potential for high-power coherent output.
  • Diffractive coupling is a method for evanescently linking optical elements.
  • Achieving phase locking in laser arrays is crucial for many applications.

Purpose of the Study:

  • To demonstrate phase locking of a linear array of seven fiber lasers.
  • To investigate the effectiveness of diffractive coupling for laser array coherence.
  • To analyze the scalability limitations of the demonstrated coupling method.

Main Methods:

  • Utilized a linear array of seven fiber lasers.
  • Employed diffractive coupling via a common output coupler at a quarter Talbot distance.

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

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Last Updated: Jun 5, 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

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

  • Measured far-field fringe contrast and total output power.
  • Analyzed phase decorrelation between lasers.

    • Main Results:

    • Successfully achieved anti-phase locking of the seven fiber lasers.
    • Measured a far-field fringe contrast of 82%.
    • Observed a total output power exceeding that of individual lasers operating alone.
    • Quantified an exponential phase decorrelation between distant lasers.

    Conclusions:

    • Diffractive coupling enables phase locking in fiber laser arrays.
    • The anti-phase locking configuration enhances output power.
    • Phase decorrelation fundamentally limits the scalability of local coupling techniques for large laser arrays.