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Optical pumping of generalized laser active materials.

F H Fry1

  • 1American Can Company, Princeton Laboratory, P. 0. Box 50, Princeton, New Jersey 08540, USA.

Applied Optics
|January 12, 2010
PubMed
Summary

Computer simulations reveal that laser active core excitation rate depends on absorption band width and pumping frequency. Optimal pumping occurs away from the absorption band center, especially in cylindrical laser models.

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Area of Science:

  • Laser Physics
  • Computational Optics

Background:

  • Optically pumped lasers are crucial for various applications.
  • Understanding excitation dynamics is key to laser efficiency.

Purpose of the Study:

  • To investigate the excitation rate in optically pumped laser active cores.
  • To analyze the influence of absorption band characteristics and geometry on excitation.

Main Methods:

  • Computer-based simulations were employed.
  • Lorentzian and Gaussian functions modeled absorption bands.
  • Excitation rate was studied as a function of frequency, band width, and depth.

Main Results:

  • Excitation rate is directly proportional to absorption band width.
  • Pumping away from the absorption band center (wing pumping) is critical.
  • Cylindrical laser models show enhanced importance of wing pumping due to focusing effects.

Conclusions:

  • Absorption band width and pumping frequency significantly impact laser excitation.
  • Geometric factors, like cylindrical geometry, influence optimal pumping strategies.
  • Refractive index also plays a role in the excitation rate.

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