Modeling of Amplitude Squeezing in a Pump-Noise-Suppressed Interband Cascade Laser

A semi-classical rate equation model for the amplitude squeezing of mid-infrared interband cascade lasers is presented based on Green's function method. We analytically investigate the squeezing performance through a small signal analysis, where an additional partition noise in the output power is considered because of the anti-correlation between photons reflected and transmitted at the output laser facet. Thus, the squeezing effect can be achieved in the low frequency region with noise-suppressed pump. Amplitude squeezed states in interband cascade lasers can qualitatively be evaluated depending on the pump noise conditions. Such ultra-low amplitude noise laser sources enable various applications such as high precision measurements, metrology, and spectroscopy range where squeezed states can be used to replace current shot-noise limited laser mid-infrared sources.