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Keysight technologies News
KEYSIGHT & MCGILL UNIVERSITY ACHIEVE 1.6 TBPS O-BAND TRANSMISSION OVER 10 KM
The collaboration achieves record 1.2 Tbps and 1.6 Tbps transmission rates over 10 km using distributed feedback lasers for the carrier and local oscillators.
Keysight Technologies, Inc. and McGill University have successfully demonstrated a world record 1.2 Tbps and 1.6 Tbps O-band coherent transmissions operating over 10 km using distributed feedback lasers (DFBs) for both the carrier and local oscillator.
To address growing short-reach intra-data center traffic demands -- from 2 to 10 km – coherent transmission systems are being considered as an alternative to intensity modulation direct detection (IMDD) systems that are currently operating at 200 Gbps per wavelength over 2 km in the O-band. Low chromatic dispersion makes power-efficient coherent links an attractive replacement for IMDD technologies at 1.6 Tbps and beyond.
To demonstrate improvements in short-reach intra-data center transmission rates using a coherent O-band solution, Keysight, McGill University, and other research partners collaborated to achieve the record-breaking transmission. The demonstration system consisted of Keysight's new M8199B 256 GSa/s Arbitrary Waveform Generator that delivers 75 GHz bandwidth in combination with a thin-film lithium niobate I/Q modulator with 100 GHz bandwidth and a 110 GHz 256 GSa/s Keysight Infiniium UXR-Series Oscilloscope.
The accomplishment showcased how data centers can use coherent optical fiber transmission systems operating at 167 Gbaud, using dual-polarization, 64-quadrature amplitude modulation scheme to transmit signals at 1.6 Tbps in the O-band using DFBs for the carrier and local oscillators.