High brightness angled cavity quantum cascade lasers

D. Heydari, Y. Bai, N. Bandyopadhyay, S. Slivken, M. Razeghi

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


A quantum cascade laser (QCL) with an output power of 203 W is demonstrated in pulsed mode at 283 K with an angled cavity. The device has a ridge width of 300 μm, a cavity length of 5.8 mm, and a tilt angle of 12°. The back facet is high reflection coated, and the front facet is anti-reflection coated. The emitting wavelength is around 4.8 μm. In distinct contrast to a straight cavity broad area QCL, the lateral far field is single lobed with a divergence angle of only 3°. An ultrahigh brightness value of 156 MW cm-2sr-1 is obtained, which marks the brightest QCL to date.

Original languageEnglish (US)
Article number091105
JournalApplied Physics Letters
Issue number9
StatePublished - Mar 2 2015

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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