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We propose a globally traffic-aware passband assignment algorithm to satisfy signal integrity requirements in elastic optical networks. We implement our solution in an SDN-enabled testbed and demonstrate successful performance with DQPSK and OFDM modulation formats.
We present a detailed investigation of a double-time-lens subsystem for spectral compression of OFDM symbols. We derive optimized parameter settings by simulations and experimental characterization. The required chirp for OFDM spectral compression is very large.
We report a waveguide-type optical filter that can demultiplex an optical OFDM signal with various symbol rate sub-carriers. This filter consists of a slab star coupler-based optical DFT circuit and an array of optical switches.
We demonstrate 400Gb/s and Tbit/s transmission using Q-Well and Q-Dash mode locked laser comb sources respectively. The aggregate capacities achieved were 473.6Gb/s for 37.6GHz Q-Well device, and 1.344Tb/s for 44.7GHz Q-Dash device using IM/DD-SSB-OFDM.
In this paper we present the first detailed numerical comparison of two promising all-optical schemes to demultiplex orthogonal frequency-division multiplexing (OFDM) signals. The investigated schemes are the optical discrete Fourier transformation (O-DFT) and the optical spectral magnification (SM) based on time lenses. In the former scheme, cascaded delay-interferometers (DIs) are used to perform...
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