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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Algorithm-based continuous pulse duration tuning and performance control of a mode-locked laser diode.

N K Metzger1, V F Olle, A Wonfor

  • 1SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS, UK. nkm2@st-andrews.ac.uk

Optics Express
|March 29, 2012
PubMed
Summary
This summary is machine-generated.

A new control algorithm stabilizes monolithic mode-locked laser diodes, allowing continuous pulse duration tuning without instability. This innovation simplifies laser operation for practical applications.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Semiconductor Devices

Background:

  • Monolithic mode-locked laser diodes (MLLDs) are crucial for various applications but suffer from inherent stability issues.
  • Q-switching instabilities can limit the operational flexibility and performance of MLLDs.
  • Precise control over pulse duration is essential for advanced photonic applications.

Purpose of the Study:

  • To develop a control algorithm for stabilizing MLLDs.
  • To enable continuous and stable tuning of pulse duration.
  • To facilitate simultaneous control of output power and wavelength.

Main Methods:

  • A novel control algorithm was designed and implemented.
  • The algorithm was demonstrated on two distinct laser diode geometries.
  • Pulse duration tuning was performed across a wide range.

Main Results:

  • The algorithm successfully prevented Q-switching instabilities during continuous pulse duration tuning.
  • Achieved continuous pulse duration tuning from 0.5 ps to 2.2 ps and 1.2 ps to 10.2 ps.
  • Demonstrated simultaneous control over output power and wavelength.

Conclusions:

  • The developed algorithm effectively addresses stability issues in MLLDs.
  • Enables user-friendly, 'push-button' control over laser parameters.
  • Enhances the practical applicability of MLLDs in diverse fields.