An interband cascade laser based heterodyne detector with integrated optical amplifier and local oscillator

Sandro Dal Cin (Korresp. Autor*in), Andreas Windischhofer, Florian Pilat, Michael Leskowschek, Vito F. Pecile, Mauro David, Maximilian Beiser, Robert Weih, Johannes Koeth, Georg Marschick, Borislav Hinkov, Gottfried Strasser, Oliver H. Heckl, Benedikt Schwarz

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed


Heterodyne detection based on interband cascade lasers (ICL) has been demonstrated in a wide range of different applications. However, it is still often limited to bulky tabletop systems using individual components such as dual laser setups, beam shaping elements, and discrete detectors. In this work, a versatile integrated ICL platform is investigated for tackling this issue. A RF-optimized, two-section ICL approach is employed, consisting of a short section typically used for efficient modulation of the cavity field and a long gain section. Such a laser is operated in reversed mode, with the entire Fabry–Pérot waveguide utilized as a semiconductor optical amplifier (SOA) and the electrically separated short section as detector. Furthermore, a racetrack cavity is introduced as on-chip single-mode reference generator. The field of the racetrack cavity is coupled into the SOA waveguide via an 800 nm gap. By external injection of a single mode ICL operating at the appropriate wavelength, a heterodyne beating between the on-chip reference and the injected signal can be observed on the integrated detector section of the SOA-detector.
Seiten (von - bis)1759-1764
Frühes Online-Datum5 Feb. 2024
PublikationsstatusVeröffentlicht - Apr. 2024

ÖFOS 2012

  • 103011 Halbleiterphysik
  • 103021 Optik