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Semiconductor Lasers: New Geometries and Spectral Properties


Lang, Robert James (1986) Semiconductor Lasers: New Geometries and Spectral Properties. Dissertation (Ph.D.), California Institute of Technology.


This thesis is an investigation into the spectral properties of two broad classes of semiconductor lasers. They are (1) broad-area lasers with non-planar mirrors, specifically, those with an unstable resonator configuration, and (2) coupled-cavity semiconductor lasers.

The use of non-planar mirrors on broad-area lasers can substantially improve their properties. Chapter 2 focuses on the experimental realization of several unstable resonator semiconductor lasers, while chapter 3 presents a method of analyzing the modes of such a device.

Coupling two cavities together can drastically alter the dynamic and spectral properties of a semiconductor laser. In chapter 4 we present experimental measurements and explain the properties of a laser consisting of two side-by-side coupled cavities. We then turn to the theoretical problem of analyzing the dynamic properties of multicavity lasers. In chapter 5, we derive a general expression for the dynamic response of a multielement laser. In the process, we develop a formalism for treating the dynamics of any semiconductor laser system with particular ease of application to single-mode multielement lasers. In chapter 6, we show that 2 or more cavities can lead to bistability and bimodality. The quantum fluctuation-induced noise properties of multicavity lasers are analyzed in chapter 7. In chapter 8, we return to the single-element laser and calculate non-quantum noise contributions--specifically, thermal and diffusion noise-- which give rise to a 1/f spectrum. In chapter 9 we present a new method of deriving multicavity rate equations and point out a shortcoming of the existing coupled-mode treatments.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Applied Physics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Yariv, Amnon
Thesis Committee:
  • Yariv, Amnon
Defense Date:14 May 1986
Funding AgencyGrant Number
Record Number:CaltechETD:etd-11142007-081143
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4556
Deposited By: Imported from ETD-db
Deposited On:06 Dec 2007
Last Modified:02 Dec 2020 01:39

Thesis Files

PDF (Lang_rj_1986.pdf) - Final Version
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