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Proceedings Paper

Modulated interference effects: use of photoelastic modulators with lasers
Author(s): Theodore C. Oakberg
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Paper Abstract

When photoelastic modulators (PEMs) are used with lasers as light sources, modulated interference effects may occur. Interference which occurs due to the reflection of light at the surfaces of the PEM optical element is modulated because the surfaces of the optical element are in relative motion synchronized with the oscillations of the modulator. Since the modulated interference frequencies are exactly the same as the polarization modulation frequencies being studied, they can be very troublesome. This paper will describe these effects quantitatively, give a simple test for their existence in an optical system and describe some techniques for their suppression or elimination.

Paper Details

Date Published: 14 September 1994
PDF: 11 pages
Proc. SPIE 2265, Polarization Analysis and Measurement II, (14 September 1994); doi: 10.1117/12.186667
Show Author Affiliations
Theodore C. Oakberg, Hinds Instruments, Inc. (United States)


Published in SPIE Proceedings Vol. 2265:
Polarization Analysis and Measurement II
Dennis H. Goldstein; David B. Chenault, Editor(s)

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