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In this article we describe a promising concept, related technological challenges, and the progress in the development of a next generation XL-PON, which is able to serve 512 customers over 100 km reach at 10 Gbit/s downstream and 2.5 Gbit/s upstream data rate. The experimental results show that such a systems is feasible.
We demonstrate what we believe is the first application of the recently developed electrically pumped GaAs/AlGaAs quantum-cascade lasers in a spectroscopic gas-sensing system by use of hollow waveguides. Laser light with an emission maximum at 10.009 microm is used to investigate the mid-infrared absorption of ethene at atmospheric pressure. We used a… (More)