High power broad area quantum cascade lasers

Y. Bai*, S. Slivken, S. R. Darvish, A. Haddadi, B. Gokden, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


Broad area quantum cascade lasers (QCLs) are studied with ridge widths up to 400 μm, in room temperature pulsed mode operation at an emission wavelength around 4.45 μm. The peak output power scales linearly with the ridge width. A maximum total peak output power of 120 W is obtained from a single 400-μm -wide device with a cavity length of 3 mm. A stable far field emission characteristic is observed with dual lobes at ±38° for all tested devices, which suggests that these broad area QCLs are highly resistant to filamentation.

Original languageEnglish (US)
Article number221104
JournalApplied Physics Letters
Issue number22
StatePublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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