Modulation response measurements and evaluation of MQW InGaAsP lasers of various designs
1996 (English)In: Proc. SPIE, Vol. 2684, 1996, 138-152 p.Conference paper (Other academic)
Resultsfrom modulation measurements of 40 high-speed multi quantum well (MQW)lasers ((lambda) equals 1.55 micrometer) of various designs are presented.By fitting the careful calibrated measurements, both magnitude and phase,to an analytical transfer function we were able to determineif a certain laser was limited by thermal effects, parasitic-likeeffects, or nonlinear gain effects. We found that most ofthe devices in the study were limited by thermal effectsand/or contact parasitics. The parasitics were found to be determinedby the width of the high-doped contact layer and claddinglayers below the metallic contact. It was also found thata high doping of the separate confinement heterostructure (SCH) layersdecreases the damping of the relaxation peak since it facilitatesthe carrier transport. Improved contact design and high doped SCH-layersresulted in modulation bandwidths of around 24 GHz.
Place, publisher, year, edition, pages
1996. 138-152 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-12522DOI: 10.1117/12.236941OAI: oai:DiVA.org:kth-12522DiVA: diva2:317254
QC 20100503 NR 201408042010-05-032010-05-032012-02-14Bibliographically approved