Keywords
Quantum Cascade Laser QCL
Abstract
Quantum cascade lasers (QCLs) are semiconductor lasers that can be designed to emit over a very broad wavelength range from the mid-wave infrared (MWIR) to terahertz frequencies. Their compact size and ability to output several watts of MWIR or long-wave infrared (LWIR) radiation makes them ideal sources for directional infrared counter measures (DIRCM). This application is fueling demand for ever more powerful QCLs, but power gains from single QCLs have largely stagnated in recent years. Novel waveguide geometries such as tree-arrays seek to increase output power delivered in a single high-quality beam. InGaAs/AlInAs tree array QCLs based on ridge waveguides and multimode interference couplers are the subject of this dissertation. Guidelines for their design based on optical and thermal simulations are provided, and results from fabricated devices are presented.
Completion Date
2024
Semester
Spring
Committee Chair
Lyakh, Arkadiy
Degree
Doctor of Philosophy (Ph.D.)
College
College of Engineering and Computer Science
Department
Electrical and Computer Engineering
Degree Program
Electrical Engineering
Format
application/pdf
Identifier
DP0028306
URL
https://purls.library.ucf.edu/go/DP0028306
Language
English
Rights
In copyright
Release Date
May 2025
Length of Campus-only Access
1 year
Access Status
Doctoral Dissertation (Campus-only Access)
Campus Location
Orlando (Main) Campus
STARS Citation
Milbocker, Luke, "Design and Fabrication of Quantum Cascade Laser Tree Arrays" (2024). Graduate Thesis and Dissertation 2023-2024. 137.
https://stars.library.ucf.edu/etd2023/137
Accessibility Status
Meets minimum standards for ETDs/HUTs
Restricted to the UCF community until May 2025; it will then be open access.