Enhanced light output power of quantum cascade lasers from a tilted front facet

Enhanced light output power of quantum cascade lasers from a tilted front facet

We present a technique for enhancing the light output power of quantum cascade lasers (QCLs) by tilting of the front facet, which leads to a change of the modal reflectivity, resulting in an asymmetric light intensity distribution along the laser cavity. This asymmetry provides most of the light bei...

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Veröffentlicht in:Optics express 2013-07, Vol.21 (13), p.15869-15877
Hauptverfasser: Ahn, Sangil, Schwarzer, Clemens, Zederbauer, Tobias, Detz, Hermann, Andrews, Aaron M, Schrenk, Werner, Strasser, Gottfried
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container_end_page 15877
container_issue 13
container_start_page 15869
container_title Optics express
container_volume 21
creator Ahn, Sangil
Schwarzer, Clemens
Zederbauer, Tobias
Detz, Hermann
Andrews, Aaron M
Schrenk, Werner
Strasser, Gottfried
description We present a technique for enhancing the light output power of quantum cascade lasers (QCLs) by tilting of the front facet, which leads to a change of the modal reflectivity, resulting in an asymmetric light intensity distribution along the laser cavity. This asymmetry provides most of the light being emitted through one facet of the laser. An experimental study of threshold current, slope efficiency and light output power as a function of the front facet angles were performed and compared to conventional QCLs. The lasers with a front facet angle of 8° shows a 20% improved power output from the front facet.
doi_str_mv 10.1364/OE.21.015869
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title Enhanced light output power of quantum cascade lasers from a tilted front facet
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