14 March 2013 Intensity modulation response of injection-locked quantum cascade lasers
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Abstract
The intensity modulation (IM) property of an optical injection-locked quantum cascade (QC) laser is theoretically investigated via a three-level rate equation model. The locking regime is obtained based on the local bifurcation theory. It is shown that the injection-locked QC laser exhibits a rather flat modulation response at zero detuning, whose bandwidth increases with the injection level. In contrast to interband lasers, both positive and negative detunings enhance the modulation bandwidth. Besides, a large linewidth enhancement factor (LEF) can increase the peak amplitude in the response. Moreover, it is found that no frequency dip occurs in the IM response of injection-locked QC lasers.
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Cheng Wang, Cheng Wang, Frédéric Grillot, Frédéric Grillot, Jacky Even, Jacky Even, "Intensity modulation response of injection-locked quantum cascade lasers", Proc. SPIE 8619, Physics and Simulation of Optoelectronic Devices XXI, 86191Q (14 March 2013); doi: 10.1117/12.2002007; https://doi.org/10.1117/12.2002007
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