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12 October 2010 Beam steering in mid-infrared emitting quantum-cascade lasers
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We report large beam steering effects, observed in the far-field pattern of InP-based mid-infrared quantum-cascade lasers along the slow axis. Changing the temperature by a few degrees around room temperature or varying the drive current strongly affects the lateral direction of the output beam. The position of maximum intensity in the far-field-distribution changes by more than 20°. This beam steering effect is correlated to changes in the lateral mode distribution, as revealed by time-resolved spectroscopy of the lasing spectrum.
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Michel Kinzer, Frank Fuchs, Stefan Hugger, Borislav Hinkov, Wolfgang Bronner, Rainer Loesch, Rolf Aidam, Quankui Yang, and Hans Dieter Tholl "Beam steering in mid-infrared emitting quantum-cascade lasers", Proc. SPIE 7836, Technologies for Optical Countermeasures VII, 78360R (12 October 2010);

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