Observation of long turn-on delay in pulsed quantum cascade lasers
E. D. Cherotchenko,
V. V. Dudelev,
D. A. Mikhailov
et al.
Abstract:We present an experimental study of the turn-on delay in pulsed mid-infrared quantum cascade lasers. We report the unexpectedly long delay time depending on the pumping current, which does not agree with conventional theoretical predictions for step-like excitation. Similar behavior has been observed in InP-and InAs-based QCLs emitting near 8 µm. Numerical simulations performed using a model based on rate equations for excitation by current pulses with non-zero rise time provide fair agreement with our observa… Show more
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