Output Characteristics and High-Speed Modulation of Composite -Resonator Vertical -Cavity Lasers
Grasso, Daniel M.
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https://hdl.handle.net/2142/80957
Description
Title
Output Characteristics and High-Speed Modulation of Composite -Resonator Vertical -Cavity Lasers
Author(s)
Grasso, Daniel M.
Issue Date
2006
Doctoral Committee Chair(s)
Choquette, Kent D.
Department of Study
Electrical and Computer Engineering
Discipline
Electrical and Computer Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
In this dissertation, the novel output characteristics of the CRVCL are explored with the goal of understanding the high-speed direct modulation of these devices from theoretical and experimental perspectives. The epitaxial structure is considered and one dimensional simulations of the mode profile in the CRVCL are used to model several different designs, which are confirmed by secondary ion mass spectroscopy measurements of two grown wafer structures. The mask layout used for the fabrication of these devices is discussed, as well as the clean-room fabrication procedure for dual oxide-confined cavity CRVCLs and hybrid ion-implanted/oxide-confined devices. The dc characteristics are presented, including the light output versus current characteristics, differential slope efficiency, optical spectra, and output polarization. A rate-equation model with two independent carrier populations and a single optical mode is presented and the resulting modulation response is derived. Finally, the experimental high-speed characteristics are presented, including small-signal direct modulation and relative intensity noise measurements. The measured data in this chapter is compared to theoretical models, and several figures of merit for high-speed operation are calculated. The thesis concludes with an evaluation of the novelty of the CRVCL and the feasibility of its use in an analog optical link.
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