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5 March 2021 Vertically emitting ring interband cascade lasers
Hedwig Knötig, Borislav Hinkov, Robert Weih, Benedikt Schwarz, Stefan Lindner, Johannes P. Waclawek, Bernhard Lendl, Sven Höfling, Johannes Koeth, Gottfried Strasser
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Proceedings Volume 11705, Novel In-Plane Semiconductor Lasers XX; 1170517 (2021) https://doi.org/10.1117/12.2577764
Event: SPIE OPTO, 2021, Online Only
Abstract
We have demonstrated that both ring quantum cascade (QCLs) and interband cascade lasers (ICLs) are excellent platforms for vertical light emission. Of these two lasers ICLs typically show lower power consumption and lasing threshold, qualifying them especially for miniaturized and battery-powered applications. With our work on ring ICLs we are aiming to build a compact portable sensing device, employing interferometric cavity-assisted photothermal spectroscopy. Here, we present our current work on interband cascade devices, as well as an overview of previous studies on ring QCLs. These devices rely on the light outcoupling via a second-order distributed-feedback grating from a ring cavity.
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Hedwig Knötig, Borislav Hinkov, Robert Weih, Benedikt Schwarz, Stefan Lindner, Johannes P. Waclawek, Bernhard Lendl, Sven Höfling, Johannes Koeth, and Gottfried Strasser "Vertically emitting ring interband cascade lasers", Proc. SPIE 11705, Novel In-Plane Semiconductor Lasers XX, 1170517 (5 March 2021); https://doi.org/10.1117/12.2577764
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KEYWORDS
Quantum cascade lasers
Interferometry
Laser applications
Laser damage threshold
Spectroscopes
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