Room-temperature operation of 3.6 μm In0.53Ga 0.47As/Al0.48In0.52 As quantum cascade laser sources based on intracavity second harmonic generation

M. Jang, R. W. Adams, J. X. Chen, W. O. Charles, Claire F. Gmachl, L. W. Cheng, F. S. Choa, M. A. Belkin

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Abstract

We discuss a design of short-wavelength quantum cascade laser sources based on intracavity second harmonic generation. A passive heterostructure tailored for giant optical nonlinearity is integrated on top of an active region and patterned for quasiphase matching. We demonstrate operation of λ≈3.6 μm lattice-matched InGaAs/AlInAs/InP sources with approximately 6 μW of second-harmonic output at room temperature and conversion efficiency of approximately 130 μW/W2. Threshold current densities of devices with a nonlinear section were similar to that of the reference lasers without the nonlinear section.

Original languageEnglish (US)
Article number141103
JournalApplied Physics Letters
Volume97
Issue number14
DOIs
StatePublished - Oct 4 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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