Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013
DOI: 10.1364/nfoec.2013.jth2a.39
We improved 448-Gb/s dual-carrier PDM-16QAM spectral efficiency by using optical pre-filtering and RZ pulse-shaping, allowing it to operate in a 75-GHz WDM grid transmission system at 5.6-b/s/Hz without the use of Nyquist filtering or OFDM.