Title :
Impact of the Modulation Chirp of a DEMZM on the Transmission of Signals Based on OFDM
Author :
Almeida, Paulo ; Silva, Hugo
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Coimbra, Coimbra, Portugal
Abstract :
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.
Keywords :
Long Term Evolution; OFDM modulation; optical fibre subscriber loops; optical modulation; ultra wideband communication; DEMZM; LTE signal; OFDM ultrawideband; OFDM-GbE signal; OFDM-UWB signal; OSNR penalty; dual electrode Mach-Zehnder modulator; fiber-to-the-home network; gigabit Ethernet signal; intensity modulation; long-term evolution; modulation chirp; optical signal-to-noise; orthogonal frequency-division multiplexing; signal transmission; Chirp; Modulation; Optical fiber networks; Optical fibers; Optical noise; Signal to noise ratio; Chirp; dispersion compensation; dual electrode Mach–Zehnder modulators (DEMZM); hybrid long reach fiber-to-the-home networks;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2235422
