Spectrally Fragmented Electrical Dispersion Compensation for High-Speed Microstrip Traces in Data Centers Connections

• Published in: IEEE photonics journal Vol. 8; no. 2; pp. 1 - 12
• Main Authors: London, Yanir, Sadot, Dan
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-04-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Backplanes; Communication systems; Dispersion; Electro-optical systems; Fiber optics systems; High speed; Impairment; Joints; Microstrip; Optical fiber dispersion; Optical fibers; Optical interconnects; Optical pulses; Sampling; Spectra; Substrates; microstrip; digital signal processing (DSP) compensation; optical interconnects; data centers; backplanes; high-speed; electrooptical systems; Fiber optics systems; broadband signal; frequency-dependent chromatic dispersion
• ISSN: 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2016.2547318

The frequency-dependent dispersion impairment of high-speed printed analog traces in next-generation pluggable modules is studied. This frequency dependence is considered for the first time in optical fiber communication systems. Transmission of ultra-broadband electrical signals over such traces dramatically enhances the frequency-dependent dispersion effect. Here, for the first time, an extended model of the ultrabroadband signal transmission that includes this frequency-dependent dispersion effect of the printed analog traces is proposed. Additionally, a novel approach to compensate for this frequency-dependent dispersion impairment is introduced. Inclusive analysis reveals that a significant performance improvement of up to 4 dB is achieved by using the proposed symbol-spaced sampling and reduced-complexity digital signal processing technique.