Abstract
The industry is moving toward higher data rate for dater center campus interconnect, i.e., 800G or higher. Intensity modulation direct detection technology based on 200G/lane has difficulty meeting the distance target of 10 km and hence, coherent transmission technology becomes an alternative to meet the need in this space. O-band coherent transmission is a potential approach for lower-cost and low power consumption for campus interconnect. We study the coherent transmission in O-band using LAN-WDM with one to four wavelengths at 800G/Lane for 10 km link distance. Detailed modelling is conducted to understand the limitations imposed by fiber nonlinearities, laser linewidth and equalization length on the power budget.
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