Statistical Evaluation of PAM4 Data Center Interconnect System With Slope-Compensating Fiber Bragg Grating Tunable Dispersion Compensation Module
| Autor: | Steven Searcy, Mark Filer, Sorin Tibuleac, Francois Trepanier, Guillaume Brochu, Sylvain Boudreau |
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| Rok vydání: | 2020 |
| Předmět: |
Interconnection
Terahertz radiation Computer science Ripple Channelized 02 engineering and technology Atomic and Molecular Physics and Optics Standard deviation 020210 optoelectronics & photonics Fiber Bragg grating Pulse-amplitude modulation Wavelength-division multiplexing 0202 electrical engineering electronic engineering information engineering Electronic engineering |
| Zdroj: | Journal of Lightwave Technology. 38:3173-3179 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2020.2969818 |
| Popis: | Data center interconnect (DCI) links with high data-rate direct-detection require strict chromatic dispersion compensation. One such solution which has been widely deployed is based on four-level pulse amplitude modulation (PAM4). With this application in mind, we describe in detail a 50-GHz channelized fiber Bragg grating (FBG) tunable dispersion compensation module (TDCM) which can compensate chromatic dispersion slope over the full C-band (4.8 THz) and is thus suitable for dense wavelength division multiplexing (DWDM) PAM4 DCI systems. We then present a comprehensive set of system performance results comprising 1,120 unique link measurements, to characterize the combined effect of statistical variations in component characteristics and link impairments, and show that a statistical approach to link budgeting is advantageous in this type of system. We also analyze the group delay ripple characteristics of the FBG-TDCM device and the corresponding impact on the PAM4 system. Instead of the conventional phase ripple standard deviation, we introduce a novel metric to quantify high-frequency phase ripple, which is better correlated with the impact on the PAM4 system. |
| Databáze: | OpenAIRE |
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