Impact of the Modulation Chirp of a DEMZM on the Transmission of Signals Based on OFDM

We investigate the transmission performance of an optical signal composed by a custom orthogonal frequency-division multiplexing (OFDM) gigabit ethernet (GbE) signal, a long-term evolution (LTE) signal, and an OFDM ultrawideband (OFDM-UWB) signal, when chirp is introduced in the intensity modulation based on a dual electrode Mach-Zehnder modulator. The results show that, when the optical signal is generated with controlled negative chirp, it is possible to reduce the optical signal-to-noise (OSNR) penalty after transmission through a long reach fiber-to-the-home network by approximately 5, 1.5, and 0.5 dB, for the OFDM-UWB, LTE, and OFDM-GbE signals, respectively. Furthermore, the results show negative OSNR penalty for OFDM-UWB and LTE signals after transmission, for specific distances.