Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 40 for “"vertical cavity surface emitting laser"”.
-
Coherently coupling multiple elements in vertical-cavity surface-emitting laser arrays
Vertical-cavity surface-emitting laser (VCSEL) arrays with three or more emitters coherently coupled are the focus of this work. VCSEL arrays have many established applications and reliable coherent VCSEL arrays are a next step in their progression. The key innovation of this work is individual …
-
Supermode analysis and characterization of the coherent vertical cavity surface emitting laser array
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
-
Vertical-cavity surface-emitting laser (VCSEL) for 50Gb/s NRZ optical link in data center
Oxide-confined Vertical-cavity Surface-Emitting Lasers (VCSELs) at 850 nm have been widely deployed in optical data transmission as the optical transmitters. However, the data transmission capability of commercial VCSELs used in 100 m optical links with direct non-return-to-zero (NRZ) modulation …
-
Development of high-speed pin photodiode and vertical-cavity surface-emitting laser for extended-reach optical communications
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
-
Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices
… be explored. Following this, the fundamentals of vertical-cavity surface-emitting lasers (VCSELs) will be discussed, and the applications of subwavelength gratings when used with these lasers will follow. Several devices, both theoretical proposals and fabricated examples, will be presented in …
-
Vertical -Cavity Surface -Emitting Lasers Operating in Photonic Crystal Waveguide Defect Modes
Single mode operation in vertical cavity surface-emitting lasers is important for sensing and communications applications. A comprehensive study of the use of a periodic array of etched circular holes in the top distributed Bragg reflector of a vertical cavity surface-emitting laser to achieve …
-
Semiconductor Laser Device-Level Characteristics
<p>High-speed modulations of the semiconductor lasers are highly desirable in cost-effective optical communication systems. Developing the experimental setups to extract the characteristics of the semiconductor lasers is vital to the future of the optical research projects. In this thesis, …
-
Coherently-coupled vertical-cavity laser arrays
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 …
-
Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays
Anti-guided vertical-cavity surface-emitting laser (VCSEL) arrays have been designed, fabricated, and characterized using a number of methods. Two-dimensional coherent arrays are useful for biological and atmospheric sensing, free-space and fiber-based optical links, high-power laser pumps, and …
-
One-dimensional simulation of vertical-cavity surface-emitting lasers including energy transport
A self-consistent one-dimensional vertical-cavity surface-emitting laser (VCSEL) simulator has been developed. The model incorporates drift-diffusion with carrier-capture and thermionic emission in the quantum regions. Microcavity effects on the stimulated and spontaneous emission are carefully …
-
Process development and fabrication of photonic crystal based III-V semiconductor optical sources
Semiconductor laser diodes play a vital role in modern technology- in such applications as facial recognition and high-speed data transmission for which efficient operation in single mode emission is desired. Vertical Cavity Surface Emitting Laser (VCSEL) diodes are at the forefront for these …
-
Evanescently Coupled Vertical Cavity Laser Arrays
Evanescent optical coupling between elements in vertical cavity surface emitting laser (VCSEL) arrays is interesting for applications in areas such as optical communications, image processing, and electronic beam-steering. Past work in coherently coupled VCSEL arrays has resulted in out-of-phase …
-
Design, fabrication, and characterization of high-speed light-emitting transistors and microcavity lasers
… been thought to be limited to ~ 1 ns in light-emitting diodes and diode lasers for the past forty years. In the present work the recombination lifetime demonstrated is able to be “tailored” (reduced) by the provided material system, cavity size, and layout design. In a light-emitting transistor …
-
Proton-Implanted Photonic Crystal and Holey Vertical -Cavity Surface -Emitting Lasers
… fabricated in the top mirror of proton-implanted vertical-cavity surface-emitting laser (VCSEL) diodes to achieve single-fundamental-mode operation. A model of the effective transverse index of refraction profile for both cases is presented. The holes are etched a variety of depths for various …
-
Coupled -Cavity Surface -Emitting Lasers: Modulation Concepts, Performance and Applications
… concepts are developed for a composite-resonator vertical-cavity laser (CRVCL) with the objective to extend laser bandwidth beyond that of a conventional vertical-cavity surface-emitting laser (VCSEL), and several new device applications for optical communication and signal processing are also …
-
Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser
High speed semiconductor lasers are used in optical transceivers for short-reach data links. With fast-growing data capacity and traffic in the data centers around the globe, faster optical transceivers are demanded. A microcavity vertical cavity surface-emitting laser (VCSEL) is able to show a …
-
Micro- and nano-cavity lasers for sensing applications
Lasers can be used for a multitude of sensing applications. This dissertation discusses two types of lasers for sensing applications. The use of an integrated vertical-cavity surface-emitting laser and photodetector as a position sensor is first detailed. Design, fabrication, and simulation of the …
-
Microwave characterization of vertical cavity surface emitting diode laser and transistor laser
Semiconductor lasers are widely deployed in optical transceivers for optical fiber based short-reach (< 100m) data links. With increasingly growing data traffic worldwide in data centers, developments of faster optical transceivers, hence high-speed semiconductor lasers, are highly demanded. The …
-
Non-Hermitian aspects of coherently coupled vertical cavity laser arrays
… (2 × 1) optically coupled electrically isolated vertical cavity surface emitting laser (VCSEL) arrays have been studied both theoretically and experimentally. Because of the tunable gain/loss profile in the array, the coupled laser system is non-Hermitian in analogy with non-Hermitian quantum …
Page 1 of 2