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Coherently-coupled vertical-cavity laser arrays
Johnson, Matthew
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https://hdl.handle.net/2142/46669
Description
- Title
- Coherently-coupled vertical-cavity laser arrays
- Author(s)
- Johnson, Matthew
- Issue Date
- 2014-01-16T17:58:30Z
- Director of Research (if dissertation) or Advisor (if thesis)
- Choquette, Kent D.
- Doctoral Committee Chair(s)
- Choquette, Kent D.
- Committee Member(s)
- Coleman, James J.
- Popescu, Gabriel
- Wasserman, Daniel M.
- Department of Study
- Electrical & Computer Eng
- Discipline
- Electrical & Computer Engr
- Degree Granting Institution
- University of Illinois at Urbana-Champaign
- Degree Name
- Ph.D.
- Degree Level
- Dissertation
- Date of Ingest
- 2014-01-16T17:58:30Z
- Keyword(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.
- Graduation Semester
- 2013-12
- Permalink
- http://hdl.handle.net/2142/46669
- Copyright and License Information
- Copyright 2013 Matthew Johnson
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Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at IllinoisDissertations and Theses - Electrical and Computer Engineering
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