Single-Mode Three-Level Laser Coupled to Thermal Reservoir
No Thumbnail Available
Date
2016-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
In this thesis, we have studied the quantum properties of the light produced by degenerate
three-level laser in which three-level atoms available in a cavity coupled to a thermal
reservoir are pumped from the lower to the upper level at the rate ra. Employing the
master equation, we have obtained the quantum Langevin equations for the cavity mode
and atomic operators. With the aid of the solutions of these equations, we have calculated
the mean and variance of the photon number, the quadrature variance, the quadrature
squeezing and power spectrum for the cavity light.
We have found that the variance of the photon number is greater than the mean photon
number, indicating that the light produced by degenerate three-level laser has super-
Poissonian photon statistics. On the other hand, we have realized that the presence
of thermal reservoir decreases the quadrature squeezing. The maximum quadrature
squeezing of the light generated by degenerate three-level laser is found to be 50% for
n = 0 and 36:6% for n = 0:2 below a vacuum state leve
Description
Keywords
A three-level laser is a quantum optical system