Driven degenerate Λ -type three-level laser with squeezed vacuum reservoir.

This study presents a comprehensive study of a driven degenerate Λ-type three-level laser system utilizing a squeezed vacuum reservoir to enhance its performance. The interaction between the laser medium and the squeezed vacuum field is analyzed, revealing significant improvements in coherence and output characteristics. By employing a Λ-type configuration, we explore the population inversion dynamics and the role of squeezed states in reducing quantum noise, ultimately leading to enhanced laser stability and efficiency. Theoretical models are developed to describe the laser dynamics, incorporating the effects of external pumping and the non-classical properties of the squeezed vacuum. Numerical simulations demonstrate that the incorporation of squeezed states leads to a notable increase in the laser's output power and spectral purity compared to traditional systems. These findings suggest that squeezed vacuum reservoirs can serve as a powerful tool for advancing the capabilities of three-level laser systems, with potential applications in quantum optics, communication technologies, and precision measurement.