We present the design and performance of a novel broadly tunable continuous-wave external-cavity interband cascade laser (ECicL). The ICL die growth and fabrication, as well as the external cavity geometry are described. Tuning across the 3.2-3.35 microm wavelength range, limited by the gain width of the ICL active medium, is achieved at a maximum power level of 4 mW.
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Caffey et al. (2010) studied this question.
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