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Experimental demonstration of dual O+C-band WDM transmission over 50-km SSMF with direct detection

Experimental demonstration of dual O+C-band WDM transmission over 50-km SSMF with direct detection
Experimental demonstration of dual O+C-band WDM transmission over 50-km SSMF with direct detection
In this paper, we experimentally demonstrate dual O+C-band direct-detection wavelength division multiplexed (WDM) transmission over 50 km of standard single-mode fibre, wherein 4×40-Gb/s Nyquist on-off keying (OOK) modulation is used in the O-band whilst 4×40-Gb/s single-sideband (SSB) subcarrier modulation (SCM) with Kramers-Kronig (KK) detection is used in the C-band. A bismuth-doped fibre amplifier (BDFA) is used as the pre-amplifier in the O-band to extend the reach of the direct-detection system. It is demonstrated that the O-band exhibits superior receiver sensitivity relative to the C-band and its transmission performance is limited by the chromatic dispersion (CD), especially when longer reaches and wavelengths in the longer edge of the band are explored. In contrast, due to the adoption of the SSB format, the C-band shows enhanced tolerance to CD effects. In this case, some receiver sensitivity is sacrificed to accommodate the adoption of the KK detection which is used to eliminate the signal-to-signal beating interference of the SSB-SCM format. The inferior receiver sensitivity in the C-band is caused by (1) the higher CSPR requirement of the KK detection and (2) the restriction of small-signal modulation for the dual-drive Mach–Zehnder modulator to generate optical SSB signals. The results indicate the feasibility to further extend the reach of O-band transmission systems, which enables the possibility to realise dual O+C-band WDM transmission in intermediate- to long-haul optical networks.
0733-8724
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
Umnikov, Andrey A
9b57cc1b-d0f9-4c34-9409-a58ee0f70250
Sahu, Jayanta
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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
Umnikov, Andrey A
9b57cc1b-d0f9-4c34-9409-a58ee0f70250
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, Umnikov, Andrey A, Sahu, Jayanta, Richardson, David and Petropoulos, Periklis (2020) Experimental demonstration of dual O+C-band WDM transmission over 50-km SSMF with direct detection. Journal of Lightwave Technology. (doi:10.1109/JLT.2020.2964155).

Record type: Article

Abstract

In this paper, we experimentally demonstrate dual O+C-band direct-detection wavelength division multiplexed (WDM) transmission over 50 km of standard single-mode fibre, wherein 4×40-Gb/s Nyquist on-off keying (OOK) modulation is used in the O-band whilst 4×40-Gb/s single-sideband (SSB) subcarrier modulation (SCM) with Kramers-Kronig (KK) detection is used in the C-band. A bismuth-doped fibre amplifier (BDFA) is used as the pre-amplifier in the O-band to extend the reach of the direct-detection system. It is demonstrated that the O-band exhibits superior receiver sensitivity relative to the C-band and its transmission performance is limited by the chromatic dispersion (CD), especially when longer reaches and wavelengths in the longer edge of the band are explored. In contrast, due to the adoption of the SSB format, the C-band shows enhanced tolerance to CD effects. In this case, some receiver sensitivity is sacrificed to accommodate the adoption of the KK detection which is used to eliminate the signal-to-signal beating interference of the SSB-SCM format. The inferior receiver sensitivity in the C-band is caused by (1) the higher CSPR requirement of the KK detection and (2) the restriction of small-signal modulation for the dual-drive Mach–Zehnder modulator to generate optical SSB signals. The results indicate the feasibility to further extend the reach of O-band transmission systems, which enables the possibility to realise dual O+C-band WDM transmission in intermediate- to long-haul optical networks.

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Accepted/In Press date: 31 December 2019
e-pub ahead of print date: 6 January 2020

Identifiers

Local EPrints ID: 436930
URI: http://eprints.soton.ac.uk/id/eprint/436930
ISSN: 0733-8724
PURE UUID: 8d8a80de-3d13-477d-8e68-274b253b1690
ORCID for Naresh Kumar Thipparapu: ORCID iD orcid.org/0000-0002-5153-4737
ORCID for Andrey A Umnikov: ORCID iD orcid.org/0000-0001-6006-5410
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034

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Date deposited: 14 Jan 2020 17:30
Last modified: 12 May 2020 00:43

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