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Modulator-free quadrature amplitude modulation signal synthesis

Modulator-free quadrature amplitude modulation signal synthesis
Modulator-free quadrature amplitude modulation signal synthesis
The ability to generate high-speed on-off-keyed telecommunication signals by directly modulating a semiconductor laser’s drive current was one of the most exciting prospective applications of the nascent field of laser technology throughout the 1960s. Three decades of progress led to the commercialization of 2.5 Gbit/s per-channel submarine fibre optic systems that drove the growth of the internet as a global phenomenon. However, the detrimental frequency chirp associated with direct modulation forced industry to use external electro-optic modulators to deliver the next generation of on-off-keyed 10 Gbit/s systems and is absolutely prohibitive for today’s (>)100 Gbit/s coherent systems, which use complex modulation formats (for example, quadrature amplitude modulation). Here we use optical injection locking of directly modulated semiconductor lasers to generate complex modulation format signals showing distinct advantages over current and other currently researched solutions.
Liu, Zhixin
01f60f1d-54b7-4c19-b3f3-9550f9d77733
Kakande, Joseph
70e0019d-0e99-4412-8104-97c84128ae27
Kelly, Brian
dabd527e-7be6-4383-9120-d23f083add70
O’Carroll, John
4c85134e-6f0d-4063-a206-e668413eb5b5
Phelan, Richard
cf8597ff-53c7-416e-986f-059bf9f05c93
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Liu, Zhixin
01f60f1d-54b7-4c19-b3f3-9550f9d77733
Kakande, Joseph
70e0019d-0e99-4412-8104-97c84128ae27
Kelly, Brian
dabd527e-7be6-4383-9120-d23f083add70
O’Carroll, John
4c85134e-6f0d-4063-a206-e668413eb5b5
Phelan, Richard
cf8597ff-53c7-416e-986f-059bf9f05c93
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Liu, Zhixin, Kakande, Joseph, Kelly, Brian, O’Carroll, John, Phelan, Richard, Richardson, David J. and Slavík, Radan (2014) Modulator-free quadrature amplitude modulation signal synthesis. Nature Communications, 5. (doi:10.1038/ncomms6911).

Record type: Article

Abstract

The ability to generate high-speed on-off-keyed telecommunication signals by directly modulating a semiconductor laser’s drive current was one of the most exciting prospective applications of the nascent field of laser technology throughout the 1960s. Three decades of progress led to the commercialization of 2.5 Gbit/s per-channel submarine fibre optic systems that drove the growth of the internet as a global phenomenon. However, the detrimental frequency chirp associated with direct modulation forced industry to use external electro-optic modulators to deliver the next generation of on-off-keyed 10 Gbit/s systems and is absolutely prohibitive for today’s (>)100 Gbit/s coherent systems, which use complex modulation formats (for example, quadrature amplitude modulation). Here we use optical injection locking of directly modulated semiconductor lasers to generate complex modulation format signals showing distinct advantages over current and other currently researched solutions.

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More information

Accepted/In Press date: 19 November 2014
Published date: 19 December 2014
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 374533
URI: https://eprints.soton.ac.uk/id/eprint/374533
PURE UUID: aeef48ae-8c51-40b2-a0f8-dbdb6d70d099
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 20 Feb 2015 11:21
Last modified: 29 Oct 2019 02:09

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