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Title:Design and Characterization of Integrated Photonic Devices Fabricated Using Selective-Area Epitaxy and Distributed Bragg Reflector Surface Gratings
Author(s):Lammert, Robert Morand
Doctoral Committee Chair(s):Coleman, James J.
Department / Program:Electrical Engineering
Discipline:Electrical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Materials Science
Abstract:The second challenge involved with the fabricating of integrated photonic devices is the formation of integrable high-Q cavities. The optical feedback in most laser diodes is provided by cleaved facets. Unfortunately, cleaved facets are not an option when designing integrated photonic devices. However, optical feedback can be provided in integrated photonic devices using distributed Bragg reflectors (DBRs). In this dissertation, ridge-waveguide DBR lasers with first-order surface gratings are investigated. These lasers exhibit low thresholds (6 mA), high slope efficiencies (0.46 W/A), and single-frequency operation with narrow linewidths ($<$25 kHz). By varying the period of the first-order DBR grating, a wide wavelength range of 540 A (15.2 THz) is obtained with threshold currents and slope efficiencies remaining below 10 mA and above 0.40 W/A, respectively, over the entire wavelength range. These gratings are also used to fabricate DBR lasers with monolithically integrated external cavity electroabsorption (EA) modulators without modification of the active region.
Issue Date:1997
Description:105 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997.
Other Identifier(s):(MiAaPQ)AAI9812667
Date Available in IDEALS:2015-09-25
Date Deposited:1997

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