We demonstrate quantum cascade lasers emitting at wavelengths of 3-3.2μm in the InP-based material system. The laser core consists of GaInAs/AlInAs using strain balancing technique. In room temperature pulsed mode operation, threshold current densities of 1.66kA/cm2 and 1.97kA/cm2, and characteristic temperatures (T0) of 108K and 102K, are obtained for the devices emitting at 3.2μm and 3μm, respectively. Room temperature continuous wave operation is achieved at both wavelengths.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)