NDLI: Linearly polarised modes enabled PAM-4 data transmission over few-mode fibre for data centre interconnect

Content Provider	IET Digital Library
Author	Iqbal, S. Iqbal, M. Raza, A. Mirza, J. Ghafoor, S. Hajjar, M. El Butt, M. F. U.
Abstract	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) modes LP 01 and LP 11 of 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 both LP 01 and LP 11 modes 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.
Starting Page	1125
Ending Page	1127
Page Count	3
ISSN	00135194
Volume Number	56
e-ISSN	1350911X
Issue Number	Issue 21, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/56/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2020.1848
Journal	Electronics Letters
Publisher Date	2020-09-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bit Rate 100 Gbit/s Bit Rate 50 Gbit/s Code Code Division Multiplexing Computer Centres Data Centre Interconnect Data Centre Network Design of Specific Laser System Digital Signal Processing Technique Equipment And System Forward Error Correction GI-FMF Graded Index Few-mode Fibre High Data Rate Optical Transmission System Laser Resonator And Cavities Lasing Action in SemiConductor Linearly Polarised Mode Link Capacity Logic Element And Interconnect Mode Group Division Multiplexing Multiplexing And Switching in Optical Communication Optical Communication Device Optical Communication Equipment Optical Computers Optical Computing Optical Computing Technique Optical Fibre Network Optical Interconnections Optical Logic Device Optical Receiver Optical Transmission System PAM-4 Modulated Data Transmission Pulse Amplitude Modulation Received PAM-4 Signal Receiver Sensitivity Semiconductor Laser Standard OM3 Fibre Standard OM4 Fibre Surface Emitting Laser Diode Transmission Distance Transmission Performance VCSEL Vertical Cavity Surface Emitting Lasers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1060 nm single-mode vertical-cavity surface-emitting laser operating at 50 Gbit/s data rate

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Linearly polarised modes enabled PAM-4 data transmission over few-mode fibre for data centre interconnect

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