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Updated: May 30, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Optically injected mode-locked laser.

N Rebrova1, G Huyet, D Rachinskii

  • 1Tyndall National Institute, Cork Institute of Technology, Ireland.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|July 30, 2011
PubMed
Summary
This summary is machine-generated.

We analyzed a passively mode-locked semiconductor laser model with coherent injection. The study determined the locking cone width, crucial for understanding laser stability under external influence.

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Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers
  • Nonlinear Dynamics

Background:

  • Passively mode-locked semiconductor lasers are vital for various applications.
  • Coherent injection is a common technique to control laser output.
  • Understanding laser dynamics under injection is essential for device design.

Purpose of the Study:

  • To analytically and numerically investigate a delay differential model of a passively mode-locked semiconductor laser.
  • To calculate the locking cone width under specific conditions (small injection, zero line-width enhancement factor).
  • To compare analytical results with numerical simulations and discuss parameter dependencies.

Main Methods:

  • Analytical calculations using asymptotic expansions.
  • Numerical integration of the delay differential model equations.
  • Comparison of theoretical predictions with simulation data.

Main Results:

  • The locking cone width was calculated asymptotically for small injection and zero line-width enhancement factors.
  • Analytical results were found to be in good agreement with numerical simulations.
  • The dependence of the locking cone width on key laser parameters was elucidated.

Conclusions:

  • The study provides a validated method for determining the locking cone width in passively mode-locked semiconductor lasers.
  • The findings contribute to a deeper understanding of laser stability and control under coherent injection.
  • This research aids in the design and optimization of semiconductor laser systems.