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Proceedings Paper

Electro-optic sensors: a precise in-situ alignment of quarter-wave plate
Author(s): Franjo Cecelja; Ridwan Jung; Bala Balachandran; Michael Berwick
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Paper Abstract

For a highly accurate electro-optic sensor, the tolerance of the quarter-wave plate phase retardation should be at least (lambda) /250, and the azimuthal alignment error should be within +/- 0.5 degrees. Also the phase retardation depends on the angle of incidence, which makes the alignment more difficult. The method we present uses the extinction ratio as a measure of the quality of alignment. It enables in-situ alignment of the quarter-wave plate to the phase retardation accuracy of +/- 0.5 degrees using only the components of the electro- optic sensor. The method can easily be generalized for any application and for an automated and direct measurement of the phase retardation of a wave plate with high accuracy.

Paper Details

Date Published: 25 September 1995
PDF: 7 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221701
Show Author Affiliations
Franjo Cecelja, Univ. of Surrey (United Kingdom)
Ridwan Jung, Univ. of Surrey (United Kingdom)
Bala Balachandran, Univ. of Surrey (United Kingdom)
Michael Berwick, Brunel Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII
Ramon P. DePaula; John W. Berthold, Editor(s)

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