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A communication system using multilayer coded modulation is introduced to detail the basic principles of hierarchical combined equalization based on linear minimum mean square error (MMSE) algorithm. A simplified hierarchical equalizer's extrinsic information of base-layer for 4-QAM multilayer coded modulation is presented. A new hierarchical equalization method of base layer is applied to multilayer...
We propose a compact silicon microring-based analog modulator for generation of 10-GHz sub-octave analog signals, which exhibit high optical modulation-index of up to 46% and carrier-to-noise ratio (CNR) of 57 dB. In fiber transmission, the CNR can be improved further by 10 dB with chromatic dispersion.
We propose ultra-small silicon microring-based analog electro-optic modulators, which exhibit a better SFDR by 5-dB and higher modulation-index compared to MZMs. Third-harmonic-distortion is reduced by 10-dB in fiber transmission.
Two types of ultra-small silicon microring-based duobinary modulators are proposed and compared. Required drive voltage is as low as 0.77 volt. at 10 Gb/s. Extinction ratio is > 15 dB.
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