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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

High density spectral beam combination with spatial chirp precompensation.

Eric C Cheung1, James G Ho, Timothy S McComb

  • 1Northrop Grumman Aerospace Systems, One Space Park, Redondo Beach, California 90278, USA. eric.cheung@ngc.com

Optics Express
|October 15, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel laser spectral combination method for high spectral density lasers. It achieves over 80% spectral density utilization without beam quality loss, paving the way for compact, high-power laser systems.

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Area of Science:

  • Optics and Photonics
  • Laser Technology
  • Fiber Lasers

Background:

  • High spectral density lasers are crucial for various applications.
  • Existing spectral combination methods face limitations in efficiency and scalability.
  • Achieving high spectral density utilization without compromising beam quality remains a challenge.

Purpose of the Study:

  • To introduce a new method for spectrally combining lasers with extremely high spectral density.
  • To demonstrate high spectral density utilization and preservation of beam quality.
  • To showcase the scalability and compact nature of the developed laser system.

Main Methods:

  • Development of a novel spectral combination technique for high spectral density lasers.
  • Utilizing photonic-crystal-fiber-rod amplifiers for laser amplification.
  • Employing only reflective optics and gratings for spectral combination.

Main Results:

  • Achieved greater than 80% spectral density utilization, approaching 100% theoretically.
  • Demonstrated a compact, packaged laser system with 0.5-MW peak power.
  • Maintained beam quality without degradation throughout the spectral combination process.
  • Exhibited 0.15-nm wavelength spacing in the amplified laser output.

Conclusions:

  • The novel spectral combination method is highly efficient and preserves beam quality.
  • The demonstrated compact laser system highlights the practical utility and scalability of the method.
  • This technique is adaptable for high average or peak power rare earth doped fiber lasers across various wavelengths.