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 language | English (US) |
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Article number | 141103 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 14 |
DOIs | |
State | Published - Oct 4 2010 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)