SIMTRUM offers a series of room temperature CW Single Mode (DFB) QCLs with Chip-on-Submount (COS) packaging,covering the wavelength from 4-12μm (799.6cm-1-2326.0cm-1). In addition, we provide various packaging configurations/solutions for these COS-packaged QCLs, including TO3, HHL, and LLH.