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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 26, Iss. 13 — Jul. 1, 1987
  • pp: 2522–2527

Lasers with saturable gain and distributed loss

Thomas R. Ferguson  »View Author Affiliations


Applied Optics, Vol. 26, Issue 13, pp. 2522-2527 (1987)
http://dx.doi.org/10.1364/AO.26.002522


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Abstract

The theoretical characteristics of a 1-D model of a steady-state laser with uniform saturable gain and distributed losses are calculated by iterative solution, using integration of a series representation of the two-way intensity distribution over the length of the laser. Results for this model and for the model with point losses at the end mirrors show that the output can be the same for both models over a range of the point loss factor. This factor becomes unique if the losses are also set equal, but the internal intensity distributions are similar only when the loss is low.

© 1987 Optical Society of America

History
Original Manuscript: December 8, 1986
Published: July 1, 1987

Citation
Thomas R. Ferguson, "Lasers with saturable gain and distributed loss," Appl. Opt. 26, 2522-2527 (1987)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-26-13-2522


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References

  1. W. W. Rigrod, “Saturation Effects in High-Gain Lasers,” J. Appl. Phys. 36, 2487 (1965). [CrossRef]
  2. Spontaneous emission is not included in the model. As the losses increase and the laser approaches threshold, the model predictions are increasingly in error since more gain is available for spontaneous emission and amplification. Multimode oscillation also affects the saturation characteristics. See, for example, L. W. Casperson, “Threshold Characteristics of Multimode Laser Oscillations,” J. Appl. Phys. 46, 5194 (1975). [CrossRef]
  3. If the requirement of equal potential losses is dropped and other values of t and a are used in the point loss model, the internal distribution must still vary much more over the length of the laser to provide both high output and high loss at the boundaries.

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