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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28819–28828

A laser beam quality definition based on induced temperature rise

Harold C. Miller  »View Author Affiliations


Optics Express, Vol. 20, Issue 27, pp. 28819-28828 (2012)
http://dx.doi.org/10.1364/OE.20.028819


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Abstract

Laser beam quality metrics like M2 can be used to describe the spot sizes and propagation behavior of a wide variety of non-ideal laser beams. However, for beams that have been diffracted by limiting apertures in the near-field, or those with unusual near-field profiles, the conventional metrics can lead to an inconsistent or incomplete description of far-field performance. This paper motivates an alternative laser beam quality definition that can be used with any beam. The approach uses a consideration of the intrinsic ability of a laser beam profile to heat a material. Comparisons are made with conventional beam quality metrics. An analysis on an asymmetric Gaussian beam is used to establish a connection with the invariant beam propagation ratio.

© 2012 OSA

OCIS Codes
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Physical Optics

History
Original Manuscript: September 14, 2012
Revised Manuscript: November 12, 2012
Manuscript Accepted: November 24, 2012
Published: December 12, 2012

Citation
Harold C. Miller, "A laser beam quality definition based on induced temperature rise," Opt. Express 20, 28819-28828 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-27-28819


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References

  1. A. E. Siegman, “How to (maybe) measure laser beam quality,” in DPSS (Diode Pumped Solid State) Lasers: Applications and Issues, M. Dowley, ed., 17, OSA Trends in Optics and Photonics (OSA, 1998), paper MQ1.
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  9. International Standards Organization, “Lasers and laser-related equipment-test methods for laser beam widths, divergence angles and beam propagation ratios. part 2: general astigmatic beams,” Ref. ISO 11146–2:2005(E) (2005).

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