13 July 2000 Coherent detection in a polarization interferometry-based Fourier optical signal processor
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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.
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Norbert Fruehauf, Norbert Fruehauf, } "Coherent detection in a polarization interferometry-based Fourier optical signal processor", Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); doi: 10.1117/12.391947; https://doi.org/10.1117/12.391947

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