Open AccessCrosstalk estimation of 21.12 Tb/S Nyquist superchannels with hybrid modulation using trench‐assisted multicore fibre
Author(s) -
Goyal Shivani,
Kaler Rajinder Singh,
Singh Hardeep
Publication year - 2019
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2018.5109
Subject(s) - trench , crosstalk , nyquist–shannon sampling theorem , electronic engineering , quadrature amplitude modulation , channel spacing , wavelength division multiplexing , modulation (music) , materials science , optics , computer science , physics , channel (broadcasting) , telecommunications , bit error rate , engineering , acoustics , wavelength , layer (electronics) , composite material
The transmission of 5 × 4.224 Tb/s Nyquist superchannels over 2688 km distance has been demonstrated using trench‐assisted multicore fibre (TA‐MCF) at different spans for the first time at reduced channel spacing. The channel spacing has been efficiently reduced from 32 GHz (before modulation) to 25 GHz (after modulation) using Nyquist superchannels with hybrid modulation to transmit 15 subcarriers in one superchannel without any distortion. Five Nyquist superchannels, each using 15 × 35.2 Gbaud PM‐16QAM subcarriers (4.224 Tb/s), are transmitted over seven cores of TA‐MCF with low crosstalk over the same distance. Further, by utilising the core‐to‐core rotation scheme, the inter‐core crosstalk from the neighbouring cores has been reduced after WDM/SDM transmission.