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

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Published on: February 28, 2016

Polarization-switchable Q-switched DFB fiber laser.

Alex Fraser1, Martin Bernier, Jean-Daniel Deschênes

  • 1Centre d'Optique Photonique et Laser (COPL), Pavillon d'Optique Photonique, Université Laval, Québec G1V OA6, Canada. afraser@phasoptx.com

Optics Letters
|April 6, 2010
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Summary

A novel Q-switching method enables polarization switchable fiber laser emission. This technique uses a hyper-elastic device and piezoelectric actuator to control stress on a fiber Bragg grating for rapid tuning.

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07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Area of Science:

  • Photonics and Optics
  • Materials Science

Background:

  • Distributed feedback (DFB) fiber lasers are crucial for various applications.
  • Controlling laser polarization is essential for advanced optical systems.
  • Existing polarization control methods can be complex or limited.

Purpose of the Study:

  • To introduce a novel Q-switching method for polarization switchable fiber lasers.
  • To demonstrate a new approach for achieving linearly polarized laser emission in specific directions (x or y).
  • To enable rapid and precise tuning of laser cavity Q-factor.

Main Methods:

  • Development of a polarization switchable Q-switched distributed feedback (DFB) fiber laser.
  • Implementation of a Q-switching technique based on variable birefringent phase shift.
  • Utilizing a specially designed hyper-elastic device to apply lateral stress to a fiber Bragg grating.
  • Employing a piezoelectric actuator for precise control of applied stress and Q-factor tuning.

Main Results:

  • Successful demonstration of linearly polarized laser emission switchable between x and y directions.
  • Achieved precise and rapid tuning of the cavity Q-factor through controlled stress application.
  • Validated the effectiveness of the novel Q-switching principle based on induced birefringence.

Conclusions:

  • The presented Q-switching method offers a new way to achieve polarization switchable DFB fiber laser output.
  • The technique allows for flexible and rapid control over laser polarization and Q-factor.
  • This advancement has potential implications for optical sensing, communication, and metrology.