Abstract
High speed directly modulated single mode lasers are becoming important optical components for short reach communication. In order to cover a transmission distance that is required for passive optical network and inter data-center applications, the chirp managed laser is an attractive transmitter technology. This technology enables to use a directly modulated laser for longer reach systems, resulting in a smaller footprint, low fabrication cost, and lower power consumption. Error free 10-Gb/s non-return-to-zero-ON–OFF-keying (NRZ-OOK) data transmission over 20-km standard single mode fiber (SMF) is demonstrated using a heterogeneously integrated III–V-on-Si distributed feedback laser in combination with a tunable optical filter as a transmitter and a Ge-on-Si waveguide-coupled avalanche photodiode with an integrated transimpedance amplifier (TIA) as a receiver. For inter-datacenter applications, by increasing the bias current of the laser (improving its modulation bandwidth and output power) and using a faster silicon-contacted germanium waveguide p-i-n photodetector with an integrated TIA, 28-Gb/s NRZ-OOK data transmission over 20-km standard SMF is demonstrated.
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