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Broad-area InGaAs/InP-based bipolar cascade lasers were demonstrated at emitting wavelengths near 2 μm and their spectral characteristics were investigated. These broad-area lasers operated at temperatures up to 205 K in continuous wave mode and up to room temperature in pulsed mode. Distinct spectral features were observed at high temperatures with larger currents and bias, which may result from significant Stark effects and increased excited state transitions.
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Yang et al. (2003) studied this question.
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