Three-Level Laser Dynamics with the Atoms Pumped by Electron Bombardment

TL;DR

This paper investigates the quantum properties of a three-level laser pumped by electron bombardment, revealing significant quadrature squeezing of the emitted light, which is intrinsic and consistent across frequencies.

Contribution

It provides a detailed analysis of quadrature squeezing in a three-level laser with electron bombardment pumping, highlighting its intrinsic nature and frequency independence.

Findings

Maximum quadrature squeezing is 50% below the coherent state level.

Quadrature squeezing of the output equals that inside the cavity.

Squeezing remains consistent across all frequency intervals.

Abstract

We analyze the quantum properties of the light generated by a three-level laser with a closed cavity and coupled to a vacuum reservoir. The three-level atoms available in the cavity are pumped from the bottom to the top level by means of electron bombardment and we carry out our analysis by putting the noise operators associated with the vacuum reservoir in normal order. The maximum quadrature squeezing of the light generated by the laser, operating far below threshold, is found to be 50% below the coherent-state level. We have also established that the quadrature squeezing of the output light is equal to that of the cavity light and has the same value in any frequency interval. This implies that the quadrature squeezing of the laser light is an intrinsic property of the individual photons.