Open AccessLinearly polarised modes enabled PAM‐4 data transmission over few‐mode fibre for data centre interconnect
Author(s) -
Iqbal S.,
Iqbal M.,
Raza A.,
Mirza J.,
Ghafoor S.,
ElHajjar M.,
Butt M.F.U.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2020.1848
Subject(s) - data transmission , transmission (telecommunications) , electronic engineering , optical interconnect , optical fiber , bit error rate , multiplexing , bandwidth (computing) , vertical cavity surface emitting laser , interconnection , computer science , laser , optics , materials science , channel (broadcasting) , telecommunications , engineering , physics , computer network
This Letter proposes a high data rate optical transmission system for data centre interconnects, where the authors employ vertical cavity surface emitting lasers (VCSEL) and graded index few‐mode fibre (GI‐FMF) having modal bandwidth of around 24.3 GHz.km to enhance the link capacity and range. Additionally, they consider PAM‐4 modulated data transmission at the rate of 2 × 100 Gbps using a pair of VCSELs and employing mode group division multiplexing of two linearly polarised (LP) modesLP 01andLP 11of the GI‐FMF. Digital signal processing techniques are applied at the receiver to process the received PAM‐4 signals for equalisation in order to mitigate the channel impairments. Furthermore, standard OM3 and OM4 fibres are considered as a benchmark to compare the transmission performance of the designed GI‐FMF. They observe that the designed GI‐FMF supports longer transmission distance for bothLP 01andLP 11modes upto 900 and 450 m at 50 and 100 Gbps data rates, respectively, while achieving lower receiver sensitivities for forward error correction limit of 3.8 × 10 − 3 . The proposed optical transmission system can be a potential applicant in future data centre networks supporting transmission rates in 800 Gbps to 1.6 Tbps range.