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Proceedings Paper

Experimental results of the application of PLL and ALL noise reduction for an optical sensing system
Author(s): Olivier Jerome Dussarrat; D. Fraser Clark; T. J. Moir
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Paper Abstract

Recently a new system has been proposed for the removal of cochannel or multipath interference found in an optical heterodyne sensing system. It involves an amplitude locked loop used in conjunction with a phase locked loop in the system demodulator. Such a detector has been incorporated into a free-space Doppler vibrometer detection system. This paper presents experimental results and details of the performance of such a system suffering from interferences arising from spurious scattered light with and without the new detection circuitry. The result presented indicate a dramatic improvement over conventional demodulation systems.

Paper Details

Date Published: 17 September 1997
PDF: 9 pages
Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); doi: 10.1117/12.281181
Show Author Affiliations
Olivier Jerome Dussarrat, Univ. of Paisley (United Kingdom)
D. Fraser Clark, Univ. of Paisley (United Kingdom)
T. J. Moir, Univ. of Paisley (United Kingdom)


Published in SPIE Proceedings Vol. 3098:
Optical Inspection and Micromeasurements II
Christophe Gorecki, Editor(s)

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