We report a 2-CH EML array and its assembling technique for the next-generation IM-DD system. In this paper, we fabricate an arrayed EML consisting of BH DFB-LDs and high-mesa EA modulators in a single chip. We obtained a 3-dB bandwidth above 67 GHz (bandwidth is higher but could not be measured due to equipment limit), low inter-channel crosstalk below -20 dB, and an excellent eye quality at 112 GBaud PAM4/PAM6/PAM8.
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Shirao et al. (2024) studied this question.
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