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AuthorKardosh, Ihabdc.contributor.author
Date of accession2016-03-15T06:23:01Zdc.date.accessioned
Available in OPARU since2016-03-15T06:23:01Zdc.date.available
Year of creation2011dc.date.created
AbstractImproved emission properties of bottom-emitting vertical-cavity lasers - Vertical-cavity surface-emitting lasers (VCSELs) and related devices operating in the 980 nm spectral region are of interest for many applications like pumping of solid-state lasers or optical amplifiers as well as frequency doubling for visible laser light generation. Such applications require high-power laser sources with high beam quality. Optical output powers in the watt range and even hundreds of watts have been generated with single bottom-emitting VCSELs and two-dimensional arrays, respectively. However, these sources exhibit multimode operation and a low beam quality. The use of an extended cavity defined by one distributed Bragg reflector (DBR) of the VCSEL chip and an external curved mirror (Vertical extended-cavity surface-emitting lasers, VECSELs) allows to achieve lasing in a single transverse optical mode with high beam quality. In this thesis, bottom-emitting vertical-cavity lasers have been investigated with regard to high output power, transverse mode control and improved beam quality. The work includes fabrication, mounting and characterization of VCSELs as well as of electrically pumped VECSELs. Furthermore, intracavity frequency doubling of VECSELS establishing a blue light source emitting near 485 nm wavelength is presented. In another study, the monolithic integration of curved dielectric mirrors with VCSELs has been investigated, yielding compact single-mode high-power lasers. The lasers operate at room temperature in a stable single mode with continuous-wave output powers up to 15 mW. The presented device design demonstrates the feasibility to realize single-mode VCSELs with maximum output powers exceeding those reported in the literature so far.dc.description.abstract
Languagededc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandarddc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v3dc.rights.uri
KeywordBottom-Emitterdc.subject
KeywordBragg-Spiegeldc.subject
KeywordDBRdc.subject
KeywordMikrolinsendc.subject
KeywordMikrospiegeldc.subject
KeywordVCSELdc.subject
KeywordVECSELdc.subject
KeywordVertikallaserdiodendc.subject
Dewey Decimal GroupDDC 620 / Engineering & allied operationsdc.subject.ddc
TitleVerbesserung der Emissionseigenschaften substratseitig emittierender Vertikallaserdiodendc.title
Resource typeDissertationdc.type
DOIhttp://dx.doi.org/10.18725/OPARU-1776dc.identifier.doi
PPN689868634dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-vts-79046dc.identifier.urn
GNDFrequenzverdopplungdc.subject.gnd
GNDStrahlqualitätdc.subject.gnd
GNDVCSEL-Laserdc.subject.gnd
FacultyFakultät für Ingenieurwissenschaften und Informatikuulm.affiliationGeneral
Date of activation2012-04-03T06:48:57Zuulm.freischaltungVTS
Peer reviewneinuulm.peerReview
Shelfmark print versionW: W-H 12.853uulm.shelfmark
DCMI TypeTextuulm.typeDCMI
VTS-ID7904uulm.vtsID
CategoryPublikationenuulm.category
University Bibliographyjauulm.unibibliographie


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