eprintid: 10055090
rev_number: 21
eprint_status: archive
userid: 608
dir: disk0/10/05/50/90
datestamp: 2018-08-30 10:26:55
lastmod: 2021-10-09 23:03:44
status_changed: 2018-08-30 10:26:55
type: article
metadata_visibility: show
creators_name: Liu, Z
creators_name: Kakande, J
creators_name: Kelly, B
creators_name: O'Carroll, J
creators_name: Phelan, R
creators_name: Richardson, DJ
creators_name: Slavik, R
title: Modulator-free quadrature amplitude modulation signal synthesis
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
note: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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−1-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−1 systems and is absolutely prohibitive for today’s (>)100 Gbit s−1 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.
date: 2014
date_type: published
publisher: NATURE PUBLISHING GROUP
official_url: https://doi.org/10.1038/ncomms6911
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_manual
elements_id: 1195292
doi: 10.1038/ncomms6911
lyricists_name: Liu, Zhixin
lyricists_id: ZLIUB50
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Nature Communications
volume: 5
article_number: 5911
pages: 7
issn: 2041-1723
citation:        Liu, Z;    Kakande, J;    Kelly, B;    O'Carroll, J;    Phelan, R;    Richardson, DJ;    Slavik, R;      (2014)    Modulator-free quadrature amplitude modulation signal synthesis.                   Nature Communications , 5     , Article 5911.  10.1038/ncomms6911 <https://doi.org/10.1038/ncomms6911>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10055090/1/Liu_ncomms6911.pdf
document_url: https://discovery.ucl.ac.uk/id/eprint/10055090/8/Liu_ncomms6911-s1.pdf