Efficiency improvement of optical pattern recognition in ultra-fast all-optical intensity equalizer |
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Authors: | Hiroomi Goto Tsuyoshi Konishi Kazuyoshi Itoh |
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Institution: | (1) Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan |
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Abstract: | To cope with a larger intensity fluctuation of optical signals in optical communication networks, we have proposed and demonstrated
an ultra-fast all-optical intensity equalizer based on an optical pattern recognition technique. To achieve higher transfer
efficiency for this equalizer, we designed and fabricated a highly-efficient optical amplitude-phase filter using a diffractive
optical element for optical pattern recognition. The fabricated amplitude-phase filter provides a diffraction efficiency of
85%, and the all-optical intensity equalizer is demonstrated to have higher transfer efficiency, when this filter is used. |
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Keywords: | optical communication spatial optical filter multiple-object discriminant filter optical pattern recognition optical equalizer optical limiter |
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