Effect of optical waveguiding mechanism on the lasing action of chirped InAs/AlGaInAs/InP quantum dash lasers

Handle URI:
http://hdl.handle.net/10754/555709
Title:
Effect of optical waveguiding mechanism on the lasing action of chirped InAs/AlGaInAs/InP quantum dash lasers
Authors:
Khan, Mohammed Zahed Mustafa ( 0000-0002-9734-5413 ) ; Ng, Tien Khee ( 0000-0002-1480-6975 ) ; Lee, C.-S.; Bhattacharya, P.; Ooi, Boon S. ( 0000-0001-9606-5578 )
Abstract:
We report on the atypical emission dynamics of InAs/AlGaInAs/InP quantum dash (Qdash) lasers employing varying AlGaInAs barrier thickness (multilayer-chirped structure). The analysis is carried out via fabry-perot (FP) ridge (RW) and stripe waveguide (SW) laser characterization corresponding to the index and gain guided waveguiding mechanisms, respectively, and at different current pulse width operations. The laser emissions are found to emerge from the size dispersion of the Qdash ensembles across the four Qdash-barrier stacks, and governed by their overlapping quasi-zero dimensional density of states (DOS). The spectral characteristics demonstrated prominent dependence on the waveguiding mechanism at quasi-continuous wave (QCW) operation (long pulse width). The RW geometry showed unusual spectral split in the emission spectra on increasing current injection while the SW geometry showed typical broadening of lasing spectra. These effects were attributed to the highly inhomogeneous active region, the nonequilibrium carrier distribution and the energy exchange between Qdash groups across the Qdash-barrier stacks. Furthermore, QCW operation showed a progressive red shift of emission spectra with injection current, resulted from active region heating and carrier depopulation, which was observed to be minimal in the short pulse width (SPW) operation. Our investigation sheds light on the device physics of chirped Qdash laser structure and provides guidelines for further optimization in obtaining broad-gain laser diodes. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
KAUST Department:
Photonics Laboratory
Citation:
Khan, M. Z. M., Tien K. Ng, C-S. Lee, P. Bhattacharya, and Boon S. Ooi. "Effect of optical waveguiding mechanism on the lasing action of chirped InAs/AlGaInAs/InP quantum dash lasers." In SPIE OPTO, pp. 864005-864005. International Society for Optics and Photonics, 2013
Publisher:
SPIE-Intl Soc Optical Eng
Journal:
Novel In-Plane Semiconductor Lasers XII
Conference/Event name:
Novel In-Plane Semiconductor Lasers XII
Issue Date:
4-Mar-2013
DOI:
10.1117/12.2003462
Type:
Conference Paper
Additional Links:
http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2003462
Appears in Collections:
Conference Papers; Photonics Laboratory; Photonics Laboratory

Full metadata record

DC FieldValue Language
dc.contributor.authorKhan, Mohammed Zahed Mustafaen
dc.contributor.authorNg, Tien Kheeen
dc.contributor.authorLee, C.-S.en
dc.contributor.authorBhattacharya, P.en
dc.contributor.authorOoi, Boon S.en
dc.date.accessioned2015-05-25T14:47:24Zen
dc.date.available2015-05-25T14:47:24Zen
dc.date.issued2013-03-04en
dc.identifier.citationKhan, M. Z. M., Tien K. Ng, C-S. Lee, P. Bhattacharya, and Boon S. Ooi. "Effect of optical waveguiding mechanism on the lasing action of chirped InAs/AlGaInAs/InP quantum dash lasers." In SPIE OPTO, pp. 864005-864005. International Society for Optics and Photonics, 2013en
dc.identifier.doi10.1117/12.2003462en
dc.identifier.urihttp://hdl.handle.net/10754/555709en
dc.description.abstractWe report on the atypical emission dynamics of InAs/AlGaInAs/InP quantum dash (Qdash) lasers employing varying AlGaInAs barrier thickness (multilayer-chirped structure). The analysis is carried out via fabry-perot (FP) ridge (RW) and stripe waveguide (SW) laser characterization corresponding to the index and gain guided waveguiding mechanisms, respectively, and at different current pulse width operations. The laser emissions are found to emerge from the size dispersion of the Qdash ensembles across the four Qdash-barrier stacks, and governed by their overlapping quasi-zero dimensional density of states (DOS). The spectral characteristics demonstrated prominent dependence on the waveguiding mechanism at quasi-continuous wave (QCW) operation (long pulse width). The RW geometry showed unusual spectral split in the emission spectra on increasing current injection while the SW geometry showed typical broadening of lasing spectra. These effects were attributed to the highly inhomogeneous active region, the nonequilibrium carrier distribution and the energy exchange between Qdash groups across the Qdash-barrier stacks. Furthermore, QCW operation showed a progressive red shift of emission spectra with injection current, resulted from active region heating and carrier depopulation, which was observed to be minimal in the short pulse width (SPW) operation. Our investigation sheds light on the device physics of chirped Qdash laser structure and provides guidelines for further optimization in obtaining broad-gain laser diodes. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.en
dc.publisherSPIE-Intl Soc Optical Engen
dc.relation.urlhttp://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2003462en
dc.rightsArchived with thanks to Proceedings of SPIEen
dc.titleEffect of optical waveguiding mechanism on the lasing action of chirped InAs/AlGaInAs/InP quantum dash lasersen
dc.typeConference Paperen
dc.contributor.departmentPhotonics Laboratoryen
dc.identifier.journalNovel In-Plane Semiconductor Lasers XIIen
dc.conference.date2013-02-04 to 2013-02-07en
dc.conference.nameNovel In-Plane Semiconductor Lasers XIIen
dc.conference.locationSan Francisco, CA, USAen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Electrical Engineering and Computer Science, University of Michigan, 1301, Beal Avenue, Ann Arbor, Michigan 48109-2122, United States of America (USA)en
kaust.authorKhan, Mohammed Zahed Mustafaen
kaust.authorNg, Tien Kheeen
kaust.authorOoi, Boon S.en
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