Angled cavity broad area quantum cascade lasers

Y. Bai*, S. Slivken, Q. Y. Lu, N. Bandyopadhyay, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Angled cavity broad area quantum cascade lasers (QCLs) are investigated with surface grating-based distributed feedback (DFB) mechanisms. It is found that an angled cavity incorporating a one dimensional DFB with grating lines parallel to the laser facet offers the simplest solution for single mode and diffraction limited emission in the facet normal direction. A room temperature single mode QCL with the highest output power for wavelengths longer than 10 μm is demonstrated. This structure could be applied to a wide range of laser structures for power scaling along with spectral and spatial beam control.

Original languageEnglish (US)
Article number081106
JournalApplied Physics Letters
Issue number8
StatePublished - Aug 20 2012

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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