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Numerical and experimental study on the impact of chromatic dispersion on O-band direct-detection transmission

Numerical and experimental study on the impact of chromatic dispersion on O-band direct-detection transmission
Numerical and experimental study on the impact of chromatic dispersion on O-band direct-detection transmission
The recent emergence of efficient O-band amplification technologies has enabled the consideration of O-band transmission beyond short-reach. Despite the O-band being a low chromatic dispersion (CD) window, the impact of CD will become increasingly significant when extending the reach of direct-detection (DD) systems. In this work, we first numerically investigate the 3-dB bandwidth of single-mode fibers (SMF) and the CD-restricted transmission reach in intensity-modulation DD systems, confirming the significant difference between low- and high-dispersion O-band wavelengths. We then carry out experimental transmission studies over SMF for distances of up to 70 km at two different wavelengths, the low-dispersion 1320 nm and the more dispersive 1360 nm, enabled by the use of an O-band bismuth-doped fiber amplifier as a pre-amplifier at the receiver. We compare three 50-Gb/s optical DD formats, namely Nyquist on-off keying (OOK), Nyquist 4-ary pulse amplitude modulation (PAM4) and Kramers-Kronig detection-assisted single-sideband quadrature phase shift keying (KK-QPSK) half-cycle subcarrier modulation. Our results show that at both wavelengths, OOK and QPSK exhibit better bit error rate performance than PAM4. When transmitting over 70-km of SMF at the less dispersive wavelength of 1320 nm, 50-Gb/s OOK modulation offers more than 1.5-dB optical power sensitivity improvement at the photodiode (PD) compared to 50-Gb/s QPSK. Conversely, at 1360 nm, the required optical power to the PD can be reduced by more than 3 dB by using QPSK instead of OOK.
1559-128X
4383-4390
Hong, Yang
73d5144c-02db-4977-b517-0d2f5a052807
Bottrill, Kyle
8c2e6c2d-9f14-424e-b779-43c23e2f49ac
Taengnoi, Natsupa
1c9a8f38-f378-426c-9b5a-75e0bc165afd
Thipparapu, Naresh Kumar
a36a2b4c-b75c-4976-a753-b5fab9e54150
Wang, Yu
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Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Hong, Yang
73d5144c-02db-4977-b517-0d2f5a052807
Bottrill, Kyle
8c2e6c2d-9f14-424e-b779-43c23e2f49ac
Taengnoi, Natsupa
1c9a8f38-f378-426c-9b5a-75e0bc165afd
Thipparapu, Naresh Kumar
a36a2b4c-b75c-4976-a753-b5fab9e54150
Wang, Yu
629093a5-d7b6-408d-86bf-d2e754f739e6
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7

Hong, Yang, Bottrill, Kyle, Taengnoi, Natsupa, Thipparapu, Naresh Kumar, Wang, Yu, Sahu, Jayanta, Richardson, David and Petropoulos, Periklis (2021) Numerical and experimental study on the impact of chromatic dispersion on O-band direct-detection transmission. Applied Optics, 60 (14), 4383-4390, [424962]. (doi:10.1364/AO.424962). (In Press)

Record type: Article

Abstract

The recent emergence of efficient O-band amplification technologies has enabled the consideration of O-band transmission beyond short-reach. Despite the O-band being a low chromatic dispersion (CD) window, the impact of CD will become increasingly significant when extending the reach of direct-detection (DD) systems. In this work, we first numerically investigate the 3-dB bandwidth of single-mode fibers (SMF) and the CD-restricted transmission reach in intensity-modulation DD systems, confirming the significant difference between low- and high-dispersion O-band wavelengths. We then carry out experimental transmission studies over SMF for distances of up to 70 km at two different wavelengths, the low-dispersion 1320 nm and the more dispersive 1360 nm, enabled by the use of an O-band bismuth-doped fiber amplifier as a pre-amplifier at the receiver. We compare three 50-Gb/s optical DD formats, namely Nyquist on-off keying (OOK), Nyquist 4-ary pulse amplitude modulation (PAM4) and Kramers-Kronig detection-assisted single-sideband quadrature phase shift keying (KK-QPSK) half-cycle subcarrier modulation. Our results show that at both wavelengths, OOK and QPSK exhibit better bit error rate performance than PAM4. When transmitting over 70-km of SMF at the less dispersive wavelength of 1320 nm, 50-Gb/s OOK modulation offers more than 1.5-dB optical power sensitivity improvement at the photodiode (PD) compared to 50-Gb/s QPSK. Conversely, at 1360 nm, the required optical power to the PD can be reduced by more than 3 dB by using QPSK instead of OOK.

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AO_O-band CD impact_accepted version - Accepted Manuscript
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Accepted/In Press date: 26 April 2021

Identifiers

Local EPrints ID: 449018
URI: http://eprints.soton.ac.uk/id/eprint/449018
ISSN: 1559-128X
PURE UUID: dd9641da-27bc-4e01-9f7a-520d0df6c864
ORCID for Kyle Bottrill: ORCID iD orcid.org/0000-0002-9872-110X
ORCID for Natsupa Taengnoi: ORCID iD orcid.org/0000-0002-5319-0851
ORCID for Naresh Kumar Thipparapu: ORCID iD orcid.org/0000-0002-5153-4737
ORCID for Jayanta Sahu: ORCID iD orcid.org/0000-0003-3560-6152
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034

Catalogue record

Date deposited: 13 May 2021 16:39
Last modified: 26 Nov 2021 03:16

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Contributors

Author: Yang Hong
Author: Kyle Bottrill ORCID iD
Author: Natsupa Taengnoi ORCID iD
Author: Naresh Kumar Thipparapu ORCID iD
Author: Yu Wang
Author: Jayanta Sahu ORCID iD

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