With the introduction of PAM4 modulation, a novel 100GE optical transceiver module has been proposed using the low-cost 4×10Gbps DML TOSA and PIN ROSA. 4×25Gbps PAM4 signal transmission has been demonstrated over 2km SMF on-line with −11dBm sensitivity and 4dB link margin.

© 2014 Optical Society of America

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