Double-waveguide interband cascade laser with dual wavelength emission

Robert Weih, Julian Scheuermann, Martin Kamp, Johannes Koeth, Sven Höfling

Research output: Contribution to journalArticlepeer-review


Interband cascade lasers (ICLs) with dual wavelength emission have been realized by utilizing two spatially separated active regions in the same device. The two wavelengths (3.1 and 3.7 µm) were chosen in order to demonstrate that the usual spectral gain bandwidth of an ICL can be overcome. At 20°C, threshold current densities as low as 215 A/cm² (short wavelength) and 158 A/cm² (long wavelength) could be achieved in pulsed mode. It was possible for an epi-up mounted device to maintain dual-wavelength continuous-wave emission up to 0°C. Despite the longer wavelength emission being suppressed at higher temperatures, the shorter wavelength maintained an output power of more than 10 mW at 15°C.
Original languageEnglish
Article number251105
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 17 Dec 2018


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