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Ultra-High Frequency Dynamics of Semiconductor Injection Lasers


Lau, Kam-Yin (1981) Ultra-High Frequency Dynamics of Semiconductor Injection Lasers. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/f057-zj77.


Experimental and theoretical studies on the high frequency dynamics of (GaAl)As semiconductor lasers center on three main areas: 1) analog modulation response of laser diodes; 2) pulse (pulse code modulation) response of laser diodes and 3) generation and quenching of intensity pulsations in laser diodes coupled to external cavities.

The basic analog modulation and transient characteristics of injection lasers with various structures are studied and compared. The basic limitations on ultrahigh frequency ( > 5GHz) modulation of lasers are considered. Self-pulsations in injection lasers are studied and their interaction with external cavities are clarified. These studies lead to the quenching of self-pulsation and ultra-short short pulse generation in laser diodes by coupling to an external cavity. A novel external fiber resonator is introduced for this purpose. Pattern effects in pulse code modulation of injection lasers are studied and a bipolar pulsing scheme devoid of the above effect is described. The transverse mode shift in a transverse junction laser under ultrashort electrical pulse excitation is investigated. Finally, the frequency response of superluminescent lasers (lasers without mirrors) is analysed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Electrical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Awards:Caltech Distinguished Alumni Award, 2022.
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Yariv, Amnon
Group:Caltech Distinguished Alumni Award
Thesis Committee:
  • Bridges, William B. (chair)
  • Culick, Fred E. C.
  • Psaltis, Demetri
  • Walker, Robert Lee
  • Yariv, Amnon
Defense Date:18 May 1981
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Record Number:CaltechETD:etd-10042006-111807
Persistent URL:
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Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3918
Deposited By: Imported from ETD-db
Deposited On:12 Oct 2006
Last Modified:26 May 2022 22:26

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