Abstract
A novel low-cost and energy-efficient approach for reaching 40 Gb/s signals is proposed for cost-sensitive optical access networks. Our proposed design is constituted of an innovative low-complex high-performance digital signal processing (DSP) architecture for pulse amplitude modulation (PAM-4), reuses existing commercial cost-effective 10-G components and eliminates the need of a power-hungry radio frequency (RF) component in the transmitter. Using a multi-functional 17-tap reconfigurable adaptive Volterra-based nonlinear equalizer with noise suppression, significant improvement in receiver optical power sensitivity is achieved. Results show that over 30 km of single-mode fiber (SMF) a link power budget of 33 dB is feasible at a bit-error-rate (BER) threshold of 10−3.
Highlights
Today’s fastest standardized passive optical network (PON) is the 25 Gb/s per laneEthernet PON [1]
We used two cases, the first being identical to the experimental setup using the Erbium-doped fiber amplifier (EDFA) and a PIN with a transimpedance amplifier (TIA)
While the second replaced the latter components with a single avalanche photodiode (APD) + TIA
Summary
Today’s fastest standardized passive optical network (PON) is the 25 Gb/s per laneEthernet PON [1]. Today’s fastest standardized passive optical network (PON) is the 25 Gb/s per lane. Driven by bandwidth hungry applications such as high definition video services and virtual reality, a higher lane rate PON is under study by Telecommunication. An alternative approach is to increase the lane count by ultra-dense wavelength division multiplexing (UWDM) with central office consolidation and extended geographic coverage. On this topic, the Institute of Electrical and Electronics Engineers (IEEE) 802.3cs super PON standard under development supports a 50 km reach and a larger than 1:64 split ratio but requires a wavelength router in the field. Examples include chirp managed non-return-to-zero (NRZ) [3], electrical/optical
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