Journal
OPTICAL FIBER TECHNOLOGY
Volume 44, Issue -, Pages 69-85Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2017.12.006
Keywords
Data center interconnect; Direct detection; Stokes vector receiver; Coherent detection; Differentially coherent detection
Funding
- Maxim Integrated
- National Science Foundation [ECCS-1740291]
- CAPES fellowship [13318/13-6]
Ask authors/readers for more resources
Increased traffic demands within and between data centers now necessitate low-cost and low-power systems with per-wavelength bit rates beyond what can be easily achieved using conventional on/off keying. We review spectrally efficient links based on direct detection, Stokes vector detection, coherent detection and differentially coherent detection for data center applications. We show that limited spectral efficiency and power margin will inhibit scaling of direct detection-compatible formats beyond 100 Gbit/s. Stokes vector receivers can provide higher spectral efficiency without requiring a local oscillator laser, but require power-hungry analog-to-digital converters (ADCs) and digital signal processing (DSP). Similarly, existing DSP-based coherent systems designed for long-haul transmission may be excessively complex and power-hungry for short-reach data center links. We present low-power DSP-free coherent and differentially coherent alternatives that avoid high-speed ADCs and DSP and achieve similar performance to their DSP-based counterparts in intra-data center links and dispersioncompensated inter-data center links.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available