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Investigation on the spectral characteristics of DFB lasers with different grating configurations made by electron-beam lithography
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1993 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 11, 1405-1415 p.Article in journal (Refereed) Published
Abstract [en]

The single-mode stability for distributed-feedback (DFB) lasers with various electron-beam-written grating configurations has been investigated theoretically and experimentally, for both as-cleaved and AR-coated lasers. Other laser properties interesting for coherent and multichannel communications systems, such as linewidth and tunability, have also briefly been investigated. Lasers with more sophisticated grating structures, such as an optimized multiple phase-shifted or a corrugation-pitch-modulated grating, did not exhibit performance significantly superior to that of lambda;/4-shifted DFB lasers with an appropriate coupling coefficient. Antireflection (AR)-coating of the end facets proved indispensable for obtaining a high yield for lasers with single-mode operation at high output power and for reducing the large chip-to-chip variation seen for the as-cleaved lasers. A theoretical investigation of the effect of end reflections on the stopband and of the problem of determining the coupling coefficient was also made

Place, publisher, year, edition, pages
1993. Vol. 11, 1405-1415 p.
Keyword [en]
lambda;/4-shifted;AR-coated lasers;DFB lasers;antireflection coatings;as-cleaved;chip-to-chip variation;coherent optical links;corrugation-pitch-modulated grating;coupling coefficient;distributed-feedback;electron-beam lithography;electron-beam-written grating configurations;end facets;end reflections;high output power;high yield;laser properties;linewidth;multichannel communications systems;optimized multiple phase-shifted;semiconductor laser diodes;single-mode operation;single-mode stability;spectral characteristics;stopband;tunability;antireflection coatings;diffraction gratings;distributed feedback lasers;electron beam lithography;laser modes;laser tuning;optical films;semiconductor lasers;spectral line breadth;
National Category
Telecommunications Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-89279DOI: 10.1109/50.241930OAI: diva2:503026
NR 20140805Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2013-02-01Bibliographically approved
In thesis
1. On the Stability and Dynamics of Semiconductor Lasers
Open this publication in new window or tab >>On the Stability and Dynamics of Semiconductor Lasers
1994 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 1994
Trita-MVT, ISSN 0348-4467 ; 1994:1
National Category
Telecommunications Atom and Molecular Physics and Optics
urn:nbn:se:kth:diva-89578 (URN)
Public defence
1994-09-15, Kollegiesalen, KTH, Drottning Kristinas Väg, Stockholm, 10:00 (English)

QC 20130201

Available from: 2013-02-01 Created: 2012-02-15 Last updated: 2013-02-04Bibliographically approved

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Schatz, Richard
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