Abstract
System engineering modelling of the power-versus-current (PI) characteristics of mid-infrared quantum cascade lasers for power projection and sensing is of paramount importance in order to formulate consistent component requirements and specifications, explore the modes of operation of the laser system, and to formulate guidelines for the design and manufacture of the QCL chips. The engineering model of a QCL serves several purposes: (i) It should describe the dependence of the optical output power on the electrical input current over the full range of current values and within a temperature range of operational significance. (ii) The model parameters should be correlated to those microscopic parameters of the QCL design which dominate the structure the PI curve. (iii) The model should allow for an exploration of different modes of operation of the laser system after calibrating the model parameters in a specific mode.
© 2015 IEEE
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