Abstract
In this paper a new approach for modeling of Raman quantum cascade lasers
(QCLs) is presented which integrates electrical, optical and Raman effects.
The equivalent circuit model of laser by employing simplified two-level rate
equations of pump and Raman regions is developed. The total equivalent
circuit is composed of pump laser circuit coupled to Raman laser circuit
which models the behaviors of each component and whole device. By using the
presented model the static and dynamic performances of laser for different
parameters are investigated. The results of simulation show that the main
characteristics of laser such as threshold current, quantum efficiency,
output power and modulation response are affected by photon lifetime and
variation of population inversion conditions. Static results of model agree
favorably with experimental data from devices reported in the
literatures.
© 2010 IEEE
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