Low Power All-Digital Radio-Over-Fiber Transmission for 28-GHz Band Using Parallel Electro-Absorption Modulators
نویسندگان
چکیده
We present a low-power all-digital radio-over-fiber (RoF) transmitter for the 28 GHz band using sigma-delta modulation. Using parallel electro-absorption modulator (EAM) structure, radio signal upconversion is split between electrical and optical domains. This halves maximum bandwidth requirement of driver circuit with respect to conventional implementations. Furthermore, effect chromatic dispersion can be mitigated by tuning phase amplitude applied individual modulators, such that transmission notches are partially removed. The structure described simplified models verified in VPI TransmissionMaker. Experimental results 140 mW non-return-to-zero (NRZ) EAMs provided yield an error vector magnitude (EVM) 7.6% (5.2%) when transporting modulated at 5.25 Gb/s (2.625 Gb/s) 64-QAM over 10 km standard single mode fiber (SSMF) 1560 nm.
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ژورنال
عنوان ژورنال: Journal of Lightwave Technology
سال: 2021
ISSN: ['0733-8724', '1558-2213']
DOI: https://doi.org/10.1109/jlt.2020.3029105