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dc.contributor.authorKhan, Mohammed Zahed Mustafa
dc.contributor.authorBhattacharya, Pallab K.
dc.contributor.authorLee, Chi-Sen
dc.contributor.authorNg, Tien Khee
dc.contributor.authorOoi, Boon S.
dc.date.accessioned2014-02-05T11:37:31Z
dc.date.available2014-02-05T11:37:31Z
dc.date.issued2014-02
dc.identifier.citationKhan MZM, Ng TK, Lee C-S, Bhattacharya P, Ooi BS (2014) Investigation of Chirped InAs/InGaAlAs/InP Quantum Dash Lasers as Broadband Emitters. IEEE Journal of Quantum Electronics 50: 51-61. doi:10.1109/JQE.2013.2294092.
dc.identifier.issn0018-9197
dc.identifier.issn1558-1713
dc.identifier.doi10.1109/JQE.2013.2294092
dc.identifier.urihttp://hdl.handle.net/10754/312219
dc.description.abstractIn this paper, we assessed the effect of additionally broadened quantum dash (Qdash) optical transitions in the multi-stack dash-in-a-well laser structure at both, material and device level. A broad photoluminescence linewidth of ?150 nm demonstrates the formation of highly inhomogeneous InAs-dashes across the stacks. The transmission electron microscopy revealed small (large) average dash height from the Qdash stack with thick (thin) over grown barrier layer. The Fabry-Perot laser diodes fabricated from this chirped structure exhibits unique device physics under the short pulsewidth (SPW) and quasi-continuous wave (QCW) operation. Varying the ridge-width W from 2 to 4 ?rm showed quenching of ultrabroad lasing signature in the SPW operation, and consistent even for a wide 15 ?rm oxide strip laser diode. A lasing spectral split with reduced intensity gap in the center is observed in the QCW operation with the gap decreasing with increasing ridge-width. Such atypical lasing operation, influenced by the waveguiding mechanism is qualitatively realized by associating to the reduced vertical coupling effect of the Qdash stacks in the operation of small ridge-width lasers compared with large ridge-width and oxide stripe lasers, and leading to varying non-uniform distribution of carriers among the inhomogeneously broadened Qdash stacks in each case. Our chirped 2 × 830 ?rm ridge laser demonstrated marked improvement in the internal quantum efficiency (?80) and -3 dB lasing bandwidth, >50 nm centered at ?1.61 ?m. © 2013 IEEE.
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6678711
dc.rightsArchived with thanks to IEEE Journal of Quantum Electronics
dc.titleInvestigation of Chirped InAs/InGaAlAs/InP Quantum Dash Lasers as Broadband Emitters
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentPhotonics Laboratory
dc.identifier.journalIEEE Journal of Quantum Electronics
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, United States
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personKhan, Mohammed Zahed Mustafa
kaust.personNg, Tien Khee
kaust.personOoi, Boon S.
refterms.dateFOA2018-06-14T05:50:26Z


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