Title :
Method to generate 112 Gbit/s polarisation-multiplexed 8QAM signal
Author :
Choi, Hyun Young ; Tsuritani, Takehiro ; Morita, Itsuro
Author_Institution :
KDDI R&D Labs. Inc., Saitama, Japan
Abstract :
Proposed is a new method to synthesise the 8-ary quadrature amplitude modulation (8QAM) signal and demonstrate the 112 Gbit/s polarisation-multiplexed 8QAM system. The proposed transmitter consists of a dual-drive Mach-Zehnder modulator (DD-MZM) and phase modulators in tandem. The DD-MZM is utilised to manipulate the amplitude and phase of the optical signal by adjusting its chirp. The optical signal-to-noise ratio sensitivity of the 112 Gbit/s polarisation-multiplexed 8QAM signal to achieve the bit error rate of 10-3 is measured to be 18.8 dB (in 0.1 nm resolution bandwidth).
Keywords :
chirp modulation; error statistics; optical fibre polarisation; optical modulation; optical transmitters; quadrature amplitude modulation; wavelength division multiplexing; DD-MZM; QAM; bit error rate; bit rate 112 Gbit/s; chirp modulation; dual drive Mach-Zehnder modulator; optical signal processing; optical signal to noise ratio; phase modulator; polarisation multiplexing; quadrature amplitude modulation; transmitter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.0686
