【文章名】Room-temperature operation of 3.6 mu m In0.53Ga0.47As/Al0.48In0.52As quantum cascade laser sources based on intracavity second harmonic generation
[摘要]：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 lambda approximate to 3.6 mu m lattice-matched InGaAs/AlInAs/InP sources with approximately 6 mu W of second-harmonic output at room temperature and conversion efficiency of approximately 130 mu W/W-2. Threshold current densities of devices with a nonlinear section were similar to that of the reference lasers without the nonlinear section. c 2010 American Institute of Physics. [doi:10.1063/1.3491219]
