Distinct Lasing Operation From Chirped InAs/InP Quantum-Dash Laser

Mohammed Zahed Mustafa Khan, Tien Khee Ng, Chi-Sen Lee, Dalaver H. Anjum, Dong Kyu Cha, Pallab K. Bhattacharya, Boon S. Ooi

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We study the enhanced inhomogeneity across the InAs quantum-dash (Qdash) layers by incorporating a chirped AlGaInAs barrier thickness in the InAs/InP laser structure. The lasing operation is investigated via Fabry-Pérot ridge-waveguide laser characterization, which shows a peculiar behavior under quasi-continuous-wave (QCW) operation. Continuous energy transfer between different dash ensembles initiated quenching of lasing action among certain dash groups, causing a reduced intensity gap in the lasing spectra. We discuss these characteristics in terms of the quasi-zero-dimensional density of states (DOS) of dashes and the active region inhomogeneity. © 2009-2012 IEEE.
Original languageEnglish (US)
Pages (from-to)1501308-1501308
Number of pages1
JournalIEEE Photonics Journal
Issue number4
StatePublished - Aug 2013

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KAUST Repository Item: Exported on 2020-10-01


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