Measurement of laser spot quality

T. D. Milster, J. P. Treptau

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Several ways of measuring spot quality are compared. We examine in detail various figures of merit such as full-width-at-half maximum (FWHM), full-width-at-1/e2 maximum, Strehl ratio, and encircled energy. Our application is optical data storage, but results can be applied to other areas like space communications and high-energy lasers. We found that the optimum figure of merit in many cases is Strehl ratio.

Original languageEnglish (US)
Pages (from-to)91-96
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1991
EventLaser Beam Diagnostics - Los Angeles, CA, USA
Duration: Jan 21 1991Jan 22 1991

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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