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Title:Coherently-coupled vertical-cavity laser arrays
Author(s):Johnson, Matthew
Director of Research:Choquette, Kent D.
Doctoral Committee Chair(s):Choquette, Kent D.
Doctoral Committee Member(s):Coleman, James J.; Popescu, Gabriel; Wasserman, Daniel M.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):vertical cavity surface-emitting lasers
beam steering
phased array
optical phased array
semiconductor laser array
diode laser array
coupled mode theory
dynamic coupled mode theory
Abstract:Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left unfinished the tasks of determining the beam steering mechanism within the arrays and achieving current uniformity across large arrays without resorting to overly-complicated fabrication procedures. This work fulfills the former by establishing a full theoretical connection between the differential current injected into the array elements and the observed steering of the far-field beam. Record high beam-steering speed and phase responsivity are also demonstrated, showing promise for applications in high-speed modulation. The first in-phase emission from a coherently-coupled bottom-emitting VCSEL array is also demonstrated, along with significantly improved current uniformity across larger arrays.
Issue Date:2014-01-16
URI:http://hdl.handle.net/2142/46669
Rights Information:Copyright 2013 Matthew Johnson
Date Available in IDEALS:2014-01-16
Date Deposited:2013-12


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