Control of optical mode distribution through etched microstructures for improved broad area laser performance

P. Crump, P. Leisher, T. Matson, V. Anderson, D. Schulte, J. Bell, J. Farmer, M. Devito, R. Martinsen, Y. K. Kim, K. D. Choquette, G. Erbert, G. Tränkle

Research output: Contribution to journalArticlepeer-review

Abstract

Etching microstructures into broad area diode lasers is found to lead to more uniform near field and increased power conversion efficiency, arising from increased slope. Self-consistent device simulation indicates that this improvement is due to an increase in the effective internal injection efficiency above threshold-the nonuniform near field leads to regions of inefficient clamping of the carrier density in the laser stripe. Measurements of spontaneous emission through the substrate confirm the predicted carrier profile. Both experiment and theory show that improved overlap between carrier and power distributions correlates with improved slope.

Original languageEnglish (US)
Article number131113
JournalApplied Physics Letters
Volume92
Issue number13
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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