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All-optical analog-to-digital conversion using split-and-delay technique
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DOI：10.1109/JLT.2007.895534.png)
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摘要
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We propose a simplified configuration of all-optical analog-to-digital (A/D) conversion using nonlinear optical loop mirrors (NOLMs). While the conventional scheme of such all-optical A/D conversion requires N encoders and N thresholders, for N-bit resolution, the proposed configuration realizes an N-bit resolution only using a single encoder and thresholder, based on a split-and-delay technique, in which the encoder and the thresholder operate more than N times as fast as the sampling speed. After discussing detailed design issues of the NOLM-based encoder with particular emphasis on the so-called counterpropagating effects, all-optical 3-bit A/D conversion at 10 GS/s is experimentally demonstrated using the proposed configuration.
Keyword:
all-optical signal processing
analog-to-digital (A/D) conversion
nonlinear optical loop mirror (NOLM)
Sagnac interferometer
期刊
IF:
4.8
论文数:
1.7W
被引数:
3.8W
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