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.

Automated summary

A semi-classical rate equation model based on Green's function method is introduced for the amplitude squeezing of mid-infrared interband cascade lasers. The squeezing performance is analytically investigated through a small signal analysis, considering the anti-correlation between photons reflected and transmitted at the output laser facet, which leads to additional partition noise in the output power. The squeezing effect can be achieved in the low frequency region under noise-suppressed pump conditions. The amplitude squeezed states in interband cascade lasers can be qualitatively evaluated depending on the pump noise conditions. These ultra-low amplitude noise laser sources have various applications in high precision measurements, metrology, and spectroscopy, where they can replace current shot-noise limited laser mid-infrared sources.