An interband cascade laser based heterodyne detector with integrated optical amplifier and local oscillator
Author:
Dal Cin Sandro1ORCID, Windischhofer Andreas1, Pilat Florian1, Leskowschek Michael2, Pecile Vito F.23ORCID, David Mauro1, Beiser Maximilian1, Weih Robert4, Koeth Johannes4, Marschick Georg1, Hinkov Borislav1, Strasser Gottfried1, Heckl Oliver H.2, Schwarz Benedikt1
Affiliation:
1. Institute of Solid State Electronics, TU Wien , Gusshausstrasse 25-25a, 1040 Vienna , Austria 2. Faculty of Physics, Faculty Center for Nano Structure Research, Christian Doppler Laboratory for Mid-IR Spectroscopy , University of Vienna , Boltzmanngasse 5, 1090 Vienna , Austria 3. Vienna Doctoral School in Physics , University of Vienna , Boltzmanngasse 5, 1090 Vienna , Austria 4. Nanoplus Nanosystems and Technologies GmbH , Oberer Kirschberg 4, 97218 Gerbrunn , Germany
Abstract
Abstract
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.
Funder
Horizon 2020 Framework Programme Austrian Science Fund
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
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