Monolithic single mode interband cascade lasers with wide wavelength tunability

M. von Edlinger, R. Weih, J. Scheuermann, L. Nähle, M. Fischer, J. Koeth, M. Kamp, Sven Höfling

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Monolithic two-section interband cascade lasers offering a wide wavelength
tunability in the wavelength range around 3.7 μm are presented. Stable single mode emission in several wavelength channels was realized using the concept of binary superimposed gratings and two-segment Vernier-tuning. The wavelength selective elements in the two segments were based on specially designed lateral metal grating structures defined by electron beam lithography. A dual-step dry etch process provided electrical separation between the segments. Individual current control of the segments allowed wavelength channel selection as well as continuous wavelength tuning within channels. A discontinuous tuning range extending over 158 nm in up to six discrete wavelength channels was achieved. Mode hop free wavelength tuning up to 14 nm was observed within one channel. The devices can be operated in continuous wave mode up to 30 °C with output powers of 3.5 mW around room temperature.
Original languageEnglish
Article number201109
Number of pages4
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 19 Nov 2016


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