naa a22 4500 51072910X CHVBK 20180411082946.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12200-012-0298-2 doi (NATIONALLICENCE)springer-10.1007/s12200-012-0298-2 Zhou Xiang AT&T Labs-Research, 07748, Middletown, NJ, USA aut Enabling technologies and challenges for transmission of 400 Gb/s signals in 50 GHz channel grid [Elektronische Daten] [Xiang Zhou] This paper reviewed the recent progress in transmission of 400 Gb/s, wavelength-division-multiplexed (WDM) channels for optical networks based on the standard 50 GHz grid. We discussed the enabling modulation, coding, and line system technologies, as well as the existing challenges. It is shown that, 400 Gb/s per channel signal can be transmitted on the standard 50 GHz ITU-T grid at 8.4 b/ds/Hz net spectral efficiency (SE) over meaningful transmission reach for regional and metropolitan applications. However, further studies are needed to fully understand the potential for meeting the requirements of long-haul transmission applications. Higher Education Press and Springer-Verlag Berlin Heidelberg, 2012 modulation nationallicence coherent nationallicence quadrature amplitude modulation (QAM) nationallicence fiber nationallicence capacity nationallicence reconfigurable optical add/drop multiplexer (ROADM) nationallicence optical filtering nationallicence Nyquist pulse shaping nationallicence Frontiers of Optoelectronics SP Higher Education Press 6/1(2013-03-01), 30-45 2095-2759 6:1<30 2013 6 12200 https://doi.org/10.1007/s12200-012-0298-2 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12200-012-0298-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Zhou Xiang AT&T Labs-Research, 07748, Middletown, NJ, USA aut NATIONALLICENCE 773 0- Frontiers of Optoelectronics SP Higher Education Press 6/1(2013-03-01), 30-45 2095-2759 6:1<30 2013 6 12200 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer