Dynamics of Three-Level Laser Pumped by Electron Bombardment
| dc.contributor.advisor | Kassahun, Fesseha (PhD) | |
| dc.contributor.author | Ayehu, Desalegn | |
| dc.date.accessioned | 2019-04-15T14:15:07Z | |
| dc.date.accessioned | 2023-11-09T11:25:57Z | |
| dc.date.available | 2019-04-15T14:15:07Z | |
| dc.date.available | 2023-11-09T11:25:57Z | |
| dc.date.issued | 2017-11-03 | |
| dc.description.abstract | We have studied the statistical and squeezing properties of the light generated by a three-level laser coupled to a two-mode vacuum reservoir. The three-level atoms available in a closed cavity are pumped from the bottom to the top level by electron bombardment. We have carried out our analysis by taking the noise operators associated with the two-mode vacuum reservoir in arbitrary order. Applying the solutions of the equations of evolution of the cavity mode and atomic operators, we have determined the global mean photon number, the global photon number variance, and the global quadrature squeezing of the one-mode aswell as the two-mode cavity light. In addition, we have calculated the local mean photon number, the local photon number variance, and the local quadrature squeezing of the two-mode cavity light. We have found the maximum global quadrature squeezing of the two-mode cavity light to be 37.5% below the vacuum level. This result happens to be less than that obtained by putting the noise operators in normal order. On the other hand, the global photon number variance calculated by taking the noise operators in arbitrary order turns out to be greater than that obtained by putting the noise operators in normal order. In addition, our analysis shows that a large part of the mean and variance of the photon number are confined in a relatively small frequency interval. Furthermore, employing the density operator for the superposition of a pair of two-mode cavity light beams, we have calculated the mean photon number, the photon number variance, and the quadrature squeezing. It so happens that the global (local) mean photon number of the superposed two-mode cavity light beams is the sum of the global (local) mean photon numbers of the component two-mode cavity light beams. On the other hand, the global (local) photon number variance of the superposed two-mode cavity light beams is four times that of the separate two-mode cavity light beams. Moreover, our results show that the global (local) quadrature squeezing of the superposed two-mode cavity light beams is the same as the global (local) quadrature squeezing of the component two-mode cavity light beams. | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/17927 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Operator Dynamics | en_US |
| dc.subject | One-Mode Photon Statistics | en_US |
| dc.subject | Quadrature Squeezing | en_US |
| dc.subject | Superposed Two-Mode Light Beams | en_US |
| dc.title | Dynamics of Three-Level Laser Pumped by Electron Bombardment | en_US |
| dc.type | Thesis | en_US |