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We design a two-section quantum cascade laser that suppresses the growth of continuous waves and spatial hole-burning and thus helps grow sub-ps pulses from random quantum noise over a broad range of pump parameters.
We theoretically demonstrate that mid-infrared ultra-short pulses can be created from quantum cascade structures having two-section cavities, where one of the sections is a gain medium and the other is a resonant absorbing medium.
We theoretically incorporate quantum coherent absorption in an actively modelocked quantum cascade laser. The laser self-starts from initial quantum noise and produces a stable train of modelocked pulses at high pump powers.
We show that coherent carrier transport in quantum cascade lasers (QCLs) decreases as temperature increases due to a corresponding decrease in the quantum coherence time between the injector and active region levels.
A model to calculate the gain to absorption ratio of self-induced transparency modelocked quantum cascade lasers is presented and then used to find the gain to absorbing periods ratio that is required for stable operation.
The limits that saturable nonlinearity and group velocity dispersion impose on self-induced transparency modelocking are explored. Stable modelocked pulses exist within limiting values, but their durations and intensities change.
We study the heat removal capability of different core structures in quantum cascade lasers. We find that due to non-isotropic conductivity, core structures with higher depth dissipate heat faster than the conventional higher-width structures.
We study the heat removal capability of different core structures in quantum cascade lasers. We find that due to non-isotropic conductivity, core structures with higher depth dissipate heat faster than the conventional higher-width structures.
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