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dc.contributor.authorLi, Diaoen
dc.contributor.authorXue, Hen
dc.contributor.authorQi, Men
dc.contributor.authorWang, Yen
dc.contributor.authorAksimsek, Sen
dc.contributor.authorChekurov, Nen
dc.contributor.authorKim, Wen
dc.contributor.authorLi, Cen
dc.contributor.authorRiikonen, Jen
dc.contributor.authorYe, Fen
dc.contributor.authorDai, Qen
dc.contributor.authorRen, Zen
dc.contributor.authorBai, Jen
dc.contributor.authorHasan, Tawfiqueen
dc.contributor.authorLipsanen, Hen
dc.contributor.authorSun, Zen
dc.date.accessioned2017-08-24T13:50:08Z
dc.date.available2017-08-24T13:50:08Z
dc.date.issued2017-05-05en
dc.identifier.issn2053-1583
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/266833
dc.description.abstractGraphene electro-optic modulators (GEOMs) are emerging as a viable alternative to conventional material-based modulators mainly due to their broadband and ultrafast performance. These GEOMs with combined advantages of small footprint and low energy consumption can potentially enable various high-performance applications that are not possible using conventional approaches. Here, we report the first actively Q-switched lasers with a GEOM. In contrast to the previously reported lasers that are passively modulated by two-dimensional layered material-based saturable absorbers, our actively modulated laser concept represents significant advantages, such as electrically tunable output parameters (e.g. output repetition rate, pulse duration and pulse energy) and electro-optical synchronization. Using a single GEOM, we generate broadband Q-switched pulses at 1.55 and 2μm with output energies of up to 123 nJ. This indicates the broadband pulse generation capability of the graphene-based active devices, superior to widely used bulk material-based active modulation approaches. Our results demonstrate a simple and viable design towards broadband, high-repetition-rate, electrically modulated ultrafast lasers for various applications, such as telecommunications and spectroscopy.
dc.description.sponsorshipThe authors acknowledge funding from the European Union's Seventh Framework Programme (REA grant agreement No. 631610), EU Graphene Flagship (No. 696656), Academy of Finland (No. 276376, 284548, 295777, 304666), China Scholarship Council (CSC), Nokia foundation,the Scientific and Technological Research Council of Turkey (TÜBİTAK), International Science and Technology Cooperation Project (No. 2014DFR10780), the Foundation of the Education Committee of Shaanxi Province (No. 14JK1756, China), the Science Foundation of Northwest University (No. 13NW14), Northwest University Cross-discipline Fund for Postgraduate Students (YZZ13027), and the financial support from Centre for International Mobility (CIMO) under the Finnish Ministry of Education and Culture. ZS and FY acknowledge Funding from the State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, China. TH acknowledges funding from RAEng through a research fellowship (Graphex). We also acknowledge the provision of technical facilities of the Micronova, Nanofabrication Centre of Aalto University.
dc.languageEngen
dc.language.isoenen
dc.publisherIOP Publishing
dc.subjectgrapheneen
dc.subjectelectro-optic modulatorsen
dc.subjectfiber lasersen
dc.subjectactive Q-switchingen
dc.titleGraphene actively Q-switched lasersen
dc.typeArticle
prism.number025095en
prism.publicationDate2017en
prism.publicationName2D Materialsen
prism.volume4en
dc.identifier.doi10.17863/CAM.12901
dcterms.dateAccepted2017-04-19en
rioxxterms.versionofrecord10.1088/2053-1583/aa6e6ben
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-05-05en
dc.contributor.orcidHasan, Tawfique [0000-0002-6250-7582]
dc.identifier.eissn2053-1583
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idRoyal Academy of Engineering (RAEng) (10216/105)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
rioxxterms.freetoread.startdate2018-05-05


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