TITLE

Analysis of longitudinal mode wave guiding in vertical-cavity surface-emitting lasers with long monolithic cavity

AUTHOR(S)
Mahmoud, S. W. Z.; Unold, H. J.; Schmid, W.; Ja¨ger, R.; Michalzik, R.; Ebeling, K. J.
PUB. DATE
January 2001
SOURCE
Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p586
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Lasing mode switching between two longitudinal modes is observed in transverse single mode vertical-cavity surface-emitting lasers with an extended cavity. Near- and far-field analyses carried out on devices with 2, 4, and 8 μm cavity spacers show an inherent relation between the transverse mode diameter and the calculated oxide- or thermally induced index guiding for the oscillating modes. Depending on the designed alignment of the optical longitudinal standing wave patterns relative to the oxide layer, mode switching can either be promoted or suppressed. Record-high single mode output powers up to 5.5 mW obtained from devices with 8 μm spacers and 8μm active diameter indicate the potential of the given device concept for low-divergence fundamental mode emission as required for many applications. © 2001 American Institute of Physics.
ACCESSION #
4711298

 

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