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Proceedings Paper

Coherent detection in a polarization interferometry-based Fourier optical signal processor
Author(s): Norbert Fruehauf
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Paper Abstract

Image processing and recognition can benefit significantly from new iterative processing algorithms that require coherent detection of the output signal. A new compact and rugged Fourier optical signal processor architecture has been developed, in which a polarization-based common path interferometer performs coherent detection. Two orthogonal polarizations of the lightwave function as independent transmission channels for the object and the reference beam. The paper describes the basic parameters that govern the design of the polarization interferometry-based Fourier optical signal processor, and elaborates on implementation aspects such as special liquid crystal light modulators that modulate one polarization while passing the nonmodulated reference polarization without attentuation. This includes characterization results of actual components, development of an improved device layout, and experimental verification of the processor concept.

Paper Details

Date Published: 13 July 2000
PDF: 10 pages
Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); doi: 10.1117/12.391947
Show Author Affiliations
Norbert Fruehauf, Physical Optics Corp. (Germany)


Published in SPIE Proceedings Vol. 4046:
Advances in Optical Information Processing IX
Dennis R. Pape, Editor(s)

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