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QUANTUM FLUCTUATIONS IN SMALL LASERS
by
Kaushik Roy Choudhury
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(PHYSICS)
August 2011
Copyright 2011 Kaushik Roy Choudhury
Object Description
| Title | Quantum fluctuations in small lasers |
| Author | Choudhury, Kaushik Roy |
| Author email | kroychou@usc.edu;kroychou@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Physics |
| School | College of Letters, Arts And Sciences |
| Date defended/completed | 2010-12-08 |
| Date submitted | 2011-08-02 |
| Date approved | 2011-08-03 |
| Restricted until | 2011-08-03 |
| Date published | 2011-08-03 |
| Advisor (committee chair) | Levi, Anthony F.J. |
| Advisor (committee member) |
Haas, Stephan Zanardi, Paolo El-Naggar, Moh Wang, Chunming |
| Abstract | Quantum fluctuations play a critical role in determining the steady-state and transient response of a laser. Such fluctuations can dominate behavior when there is a small number of particles in the system. Correlations between n discrete excited electronic states and s discrete photons can create non-Poisson probability distributions and damp the average dynamic response of laser emission. In this thesis a quantum mechanical treatment of fluctuations and saturable absorption in meso-scale lasers is presented. Time evolution of the density matrix is obtained from numerical integration and field-field and intensity-intensity correlations are calculated to obtain steady-state line width and photon statistics. Inclusion of a saturable absorber in the otherwise homogeneous medium is shown to suppress lasing, increase fluctuations, and enhance spontaneous emission near threshold. Methods to connect between quantum, meso-scale and classical systems is also developed. |
| Keyword | quantum optics; meso-scale lasers; computational and theoretical physics |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Choudhury, Kaushik Roy |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume71/etd-ChoudhuryK-237.pdf |
Description
| Title | Page 1 |
| Full text | QUANTUM FLUCTUATIONS IN SMALL LASERS by Kaushik Roy Choudhury A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PHYSICS) August 2011 Copyright 2011 Kaushik Roy Choudhury |
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