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Type of Document	Dissertation
Author	Lau, Kam-Yin
URN	etd-10042006-111807
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-10042006-111807
Title	Ultra-high frequency dynamics of semiconductor injection lasers
Degree	PhD
Option	Electrical Engineering
Advisory Committee	Advisor Name Title Amnon Yariv Committee Chair
Keywords	none
Date of Defense	1981-05-18
Availability	restricted
Abstract 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.
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