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 observations.
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Cherotchenko, E. D., Dudelev, V. V., Mikhailov, D. A., Losev, S. N., Babichev, A. V., Gladyshev, A. G., … Sokolovskii, G. S. (2022). Observation of Long Turn-On Delay in Pulsed Quantum Cascade Lasers. Journal of Lightwave Technology, 40(7), 2104–2110. https://doi.org/10.1109/JLT.2021.3134837
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