Observation of Long Turn-On Delay in Pulsed Quantum Cascade Lasers

/ Authors

E. Cherotchenko, D. Mikhailov, V. Dudelev, S. Losev, A. Babichev, A. Gladyshev, I. Novikov, A. Lutetskiy, D. Veselov, S. Slipchenko

and 9 more authors

N. Pikhtin, L. Karachinsky, D. Denisov, V. Kuchinskii, E. Kognovitskaya, A. Egorov, R. Tessier, A. Baranov, G. Sokolovskii

/ 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 <inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m. 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.

Journal: Journal of Lightwave Technology

DOI: 10.1109/JLT.2021.3134837