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Linearly polarized modes enabled PAM-4 data transmission over few-mode fiber for data center interconnect

Linearly polarized modes enabled PAM-4 data transmission over few-mode fiber for data center interconnect
Linearly polarized modes enabled PAM-4 data transmission over few-mode fiber for data center interconnect
This letter proposes a high data rate optical transmission system for data center interconnects (DCIs), where we 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, we consider PAM-4 modulated data transmission at the rate of 2×100 Gbps using a pair of VCSELs and employing mode group division multiplexing (MGDM) of two linearly polarized (LP) modes LP01 and LP11 of the GI-FMF. Digital signal processing (DSP) techniques are applied at the receiver to process the received PAM-4 signals for equalization in order to mitigate the channel impairments. Furthermore, standard OM3 and OM4 fibers are considered as a benchmark to compare the transmission performance of the designed GI-FMF. We observe that the designed GI-FMF supports longer transmission distance for both LP01 and LP11 modes upto 900 m and 450 m at 50 Gbps and 100 Gbps data rates, respectively, while achieving lower receiver sensitivities for forward error correction (FEC) limit of 3.8 × 10−3. The proposed optical transmission system can be a potential applicant in future data center networks supporting transmission rates in 800 Gbps to 1.6 Tbps range.
0013-5194
Iqbal, Saeed
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Iqbal, Muhammad
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Raza, Aadil
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Mirza, Jawad
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Ghafoor, Salman
f38df426-2a21-4207-bb4a-002824556622
El-Hajjar, Mohammed
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Fasih, Muhammad
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Butt, Uddin
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Iqbal, Saeed
f6b1d941-7f40-4fda-ad8d-db18d124835f
Iqbal, Muhammad
16d8dd33-0928-412c-b765-7e8f8b8561ee
Raza, Aadil
7a795a20-300f-4b82-b00c-8ad5e40e8b9d
Mirza, Jawad
aa6a03d1-d211-4856-a3ed-8127833bd883
Ghafoor, Salman
f38df426-2a21-4207-bb4a-002824556622
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Fasih, Muhammad
8c48066e-57a4-4b28-bbb3-348799477a3a
Butt, Uddin
76ecf5e8-075b-4610-8f2f-57eb1866dfb2

Iqbal, Saeed, Iqbal, Muhammad, Raza, Aadil, Mirza, Jawad, Ghafoor, Salman, El-Hajjar, Mohammed, Fasih, Muhammad and Butt, Uddin (2020) Linearly polarized modes enabled PAM-4 data transmission over few-mode fiber for data center interconnect. Electronics Letters. (doi:10.1049/el.2020.1848).

Record type: Article

Abstract

This letter proposes a high data rate optical transmission system for data center interconnects (DCIs), where we 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, we consider PAM-4 modulated data transmission at the rate of 2×100 Gbps using a pair of VCSELs and employing mode group division multiplexing (MGDM) of two linearly polarized (LP) modes LP01 and LP11 of the GI-FMF. Digital signal processing (DSP) techniques are applied at the receiver to process the received PAM-4 signals for equalization in order to mitigate the channel impairments. Furthermore, standard OM3 and OM4 fibers are considered as a benchmark to compare the transmission performance of the designed GI-FMF. We observe that the designed GI-FMF supports longer transmission distance for both LP01 and LP11 modes upto 900 m and 450 m at 50 Gbps and 100 Gbps data rates, respectively, while achieving lower receiver sensitivities for forward error correction (FEC) limit of 3.8 × 10−3. The proposed optical transmission system can be a potential applicant in future data center networks supporting transmission rates in 800 Gbps to 1.6 Tbps range.

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Accepted/In Press date: 24 July 2020
e-pub ahead of print date: 1 September 2020

Identifiers

Local EPrints ID: 442864
URI: http://eprints.soton.ac.uk/id/eprint/442864
ISSN: 0013-5194
PURE UUID: 3cf76755-798b-4aa2-8895-4811ae83136b
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401

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Date deposited: 30 Jul 2020 16:30
Last modified: 18 Feb 2021 17:19

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Contributors

Author: Saeed Iqbal
Author: Muhammad Iqbal
Author: Aadil Raza
Author: Jawad Mirza
Author: Salman Ghafoor
Author: Mohammed El-Hajjar ORCID iD
Author: Muhammad Fasih
Author: Uddin Butt

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