Abiti, Beyene
(2011)
*Superposed Degenerate Three-Level Lasers.*
Masters thesis, Addis Ababa University.

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## Abstract

In this thesis we study the statistical and squeezing properties of the light produced by a degenerate three-level laser. Using the solutions of c-number Langevin equations, we have calculated antinormally ordered characteristic function. Then employing the resulting characteristic function, we obtain the Q-function. Applying the Q-function, we have calculated the mean photon number, the variance of phototn number, the photon number distribution and the quadrature variance. We have found that the light mode is 47:9% squeezed below the coherent state level at steady state for A = 3 and κ = 0:8. It is observed that the degree of squeezing increases with the linear gain coefficient(A). We have determined the Q-function for the superposition of the light beams produced by two degenerate three-level lasers. Using this Q-function, we have calculated the mean number of photons, the variance of photon number, the photon number distribution and quadrature variance. We have found that the steady state mean photon number is a simple sum of the mean photon numbers of the two light beams. The squeezing of the superposed light mode increases with the linear gain coefficient. It is found that for A = 3 and κ = 0:8, the squeezing is 95:8% below the coherent state level.

Item Type: | Thesis (Masters) |
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Subjects: | Q Science > Q Science (General) Q Science > QC Physics |

Divisions: | Africana |

Depositing User: | Selom Ghislain |

Date Deposited: | 18 Sep 2018 12:55 |

Last Modified: | 18 Sep 2018 12:55 |

URI: | http://thesisbank.jhia.ac.ke/id/eprint/5363 |

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