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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 10, Iss. 2 — Feb. 1, 1971
  • pp: 426–436

Thermally Induced Modifications of a High Power cw Laser Beam

P. M. Livingston  »View Author Affiliations


Applied Optics, Vol. 10, Issue 2, pp. 426-436 (1971)
http://dx.doi.org/10.1364/AO.10.000426


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Abstract

The problem of beam-induced thermal modifications of a high powered cw laser beam is considered. The extent and type of modification depend principally upon the nature of the medium (liquid or air) and whether an external flow field is present. These conditions determine the dominant heat loss mechanism operating the fluid: forced convection, free convection, and diffusion and, thus, the beam distortions. All three cases are analyzed and figures presented, showing the type of distortion expected as determined within the framework of geometric optics.

© 1971 Optical Society of America

History
Original Manuscript: April 12, 1970
Published: February 1, 1971

Citation
P. M. Livingston, "Thermally Induced Modifications of a High Power cw Laser Beam," Appl. Opt. 10, 426-436 (1971)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-10-2-426


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References

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  15. E. Gerry, private communication.
  16. A. J. Glass, “Thermal Blooming in Gases,” Research Inst. for Eng. Sci., Wayne State U., Detroit (unpublished).
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  18. Work begun as a consultant to NRL.
  19. See, for example, G. N. Murphy, Ordinary Differential Equations and Their Solutions (Van Nostrand, Princeton, N.J.1960), p. 352.
  20. E. A. McLean, L. Sica, A. J. Glass, “Interferometric Observation of Absorption Induced Index Changes Associated with Thermal Blooming,” NRL Preprint (submitted to Appl. Phys. Lett.), Oct. 1969.
  21. F. G. Gebhardt, D. C. Smith, United Aircraft Corporation, have completed a first order treatment essentially identical to the above. Experimental evidence for the correctness of the calculation in the form of measured half-moon isoirradiances in a forthcoming article will be published in Applied Optics. Our calculations were done independently with no previous communication.
  22. Chia-Shun Yih, “Free Convection due to Boundary Sources,” in Fluid Models in Geophysics, No. 1956 (U.S. GPO, Washington, D.C., 1953), pp. 117–133.

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