Laser pointing stability measured by an oblique-incidence optical transmittance difference technique

J. Gray, P. Thomas, X. D. Zhu

Research output: Contribution to journalArticle

23 Scopus citations


We describe an oblique-incidence optical transmittance technique for determining the pointing stability of a laser. In this technique, we follow the angular drift of a monochromatic laser beam by measuring the relative changes in transmittance through a parallel fused quartz window for s and p polarized components of the beam in response to the drift. This method is shown in the present experiment to have the sensitivity to detect angular changes in the range of 2 μ radians (1 μ radian=10-6 radian). To demonstrate this technique, we measured the angular drifts of two commercial intensity-stabilized He-Ne lasers.

Original languageEnglish (US)
Pages (from-to)3714-3717
Number of pages4
JournalReview of Scientific Instruments
Issue number9
StatePublished - Sep 2001


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation

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