Semiconductor laser mode engineering via waveguide index structuring
Strzebonski, Pawel Jakub
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https://hdl.handle.net/2142/102511
Description
Title
Semiconductor laser mode engineering via waveguide index structuring
Author(s)
Strzebonski, Pawel Jakub
Issue Date
2018-12-11
Director of Research (if dissertation) or Advisor (if thesis)
Choquette, Kent D.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Semiconductor Diode Lasers
Lasers
Dielectric Waveguide
Waveguide Modes
Laser Modes
Helmholtz Equation
Finite Difference Method
Modal Discrimination
Modal Selection
Mode Engineering
Beam Engineering
Beam Brightness
Abstract
Semiconductor laser diodes are used in many applications, and their performance is often strongly influenced by the optical mode properties. In this work, dielectric waveguides and their guided modes have been simulated and analyzed as relevant to semiconductor diode lasers. The transverse refractive index structure of waveguides determines the modal field profiles and modal properties. By engineering the transverse index structure we show that it is possible to increase modal discrimination and impart modal selection. We further show that we can engineer the modal field profile itself for the purpose of engineering the properties of the laser beam, such as far-field brightness. Therefore waveguide engineering using index structuring may be beneficial to enhancing semiconductor laser performance.
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