Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

On the filamentary nature of laser action

On the filamentary nature of laser action SummaryMany solid-state lasers show features which have not been predicted by the prevalent laser theories. The laser action in a ruby crystal usually produces a spotty pattern on the end faces, and the output exhibits relaxation oscillations in a random manner. These properties are closely connected with one another through the filamentary nature of the laser action. The theory for a Fabry-Perot interferometer with rectangular mirrors and a large Fresnel number is outlined. It is demonstrated that the observable single mode patterns are in the form of parabolic cylinder functions (Gaussian distribution of intensity for lowest-order eigenmode) and not of cosine and sine functions as is widely believed. This theoretical result predicts the filamentary nature of the laser action between plane parallel end faces and suggests that the irregular spiking behavior of a solid-state laser may be considered a superposition of outputs from several filaments. If the laser is operated only slightly above threshold the relaxation oscillations die away faster than predicted by the linearized Statz and deMars equations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Scientific Research, Section B Springer Journals

On the filamentary nature of laser action

Download PDF
19 pages

Loading next page...
 
/lp/springer-journals/on-the-filamentary-nature-of-laser-action-U6jNKPmRaN
Publisher
Springer Journals
Copyright
Copyright © Martinus Nijhoff 1965
ISSN
0365-7140
DOI
10.1007/bf02933514
Publisher site
See Article on Publisher Site

Abstract

SummaryMany solid-state lasers show features which have not been predicted by the prevalent laser theories. The laser action in a ruby crystal usually produces a spotty pattern on the end faces, and the output exhibits relaxation oscillations in a random manner. These properties are closely connected with one another through the filamentary nature of the laser action. The theory for a Fabry-Perot interferometer with rectangular mirrors and a large Fresnel number is outlined. It is demonstrated that the observable single mode patterns are in the form of parabolic cylinder functions (Gaussian distribution of intensity for lowest-order eigenmode) and not of cosine and sine functions as is widely believed. This theoretical result predicts the filamentary nature of the laser action between plane parallel end faces and suggests that the irregular spiking behavior of a solid-state laser may be considered a superposition of outputs from several filaments. If the laser is operated only slightly above threshold the relaxation oscillations die away faster than predicted by the linearized Statz and deMars equations.

Journal

Applied Scientific Research, Section B – Springer Journals

Published: Oct 1, 1965

Keywords: Pump Power; Ruby; Laser Action; Relaxation Oscillation; Ruby Laser

References

  • Transients and Oscillation Pulses in Masers
    Statz, H.; deMars, G.; Townes, C. H.
  • Stimulated Emission from CaF2: U+3 and CaF2: Sm+2
    Sorokin, P. P.; Stevenson, M. J.; Singer, J. R.
  • Transverse Mode Patterns in Neodymium Glass and Ruby
    Dayhoff, E. S.
  • Stimulation versus Emission in Ruby Optical Masers
    Stitch, M. L.; Woodbury, E. J.; Morse, J. H.
  • Amplitude and Frequency Variations in Ruby Optical Masers
    Shimoda, K.; Fox, J.