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This tutorial is based on the following publication.
[YuSST2010]
Injector doping level-dependent continous-wave operation of InP-based QCLs at $\lambda = 7.3 {\rm~\mu m}$ above room temperature
J. S. Yu, S. Slivken, M. Razeghi
Semiconductor Science and Technology 25, 125015 (2010)
This paper describes an InGaAs/InAlAs Mid-IR quantum cascade laser (QCL) operating at $\lambda = 7.3 \micro{\rm m}$.
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