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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Bidirectional mode-locked fiber ring laser using self-regenerative, passively controlled, threshold gating.

Alexandre Braga1, Jean-Claude Diels, Ravinder Jain

  • 1University of New Mexico, Center for High Technology Materials, 1313 Goddard, SE, Albuquerque, New Mexico 87106, USA. apbraga@unm.edu

Optics Letters
|August 4, 2010
PubMed
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We developed a new fiber ring laser technique for bidirectional mode locking. This method generates two independent pulses, enabling precise control and minimizing dead bands for scattering media applications.

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Fiber Optic Technology

Background:

  • Bidirectional fiber ring lasers are crucial for applications requiring counterpropagating light.
  • Existing methods face challenges with pulse synchronization and dead band effects at scattering media.

Purpose of the Study:

  • To demonstrate a novel technique for achieving stable bidirectional mode locking in a fiber ring laser.
  • To enable independent control over countercirculating pulses and minimize dead band interference.

Main Methods:

  • Utilized two amplitude modulators passively driven by the laser's own regenerated signal.
  • Implemented a scheme for generating two independent-frequency, unlocked, countercirculating pulses.
  • Actively controlled the crossing points of the generated pulses.

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

Last Updated: Jun 10, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

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

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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Main Results:

  • Achieved stable bidirectional mode locking with two independent pulses.
  • Demonstrated active control over pulse crossing points.
  • Minimized the dead band effect when interacting with scattering media, showing no detectable dead band.
  • Generated stable pulses at a 5 MHz repetition rate.

Conclusions:

  • The proposed technique offers a robust solution for bidirectional mode locking in fiber ring lasers.
  • This method enhances control over pulse interactions, particularly beneficial for scattering media applications.
  • The absence of a detectable dead band signifies a significant improvement over existing techniques.