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 23 for “"laser arrays"”.
-
Evanescently Coupled Vertical Cavity Laser Arrays
… 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 arrays or more desirable in-phase …
-
Coherently-coupled vertical-cavity laser arrays
… 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 …
-
Nonlinear dissipative dynamics of optomechanical and laser arrays
… gauge fields for photons in optomechanical arrays and (ii) laser arrays with a topologically nontrivial structure. The chosen models are relevant to state-of-the-art optomechanical experiments as well as to recent implementations of topological lasers based on semiconductor ring-resonator …
-
Semiconductor Laser Arrays Grown by Metalorganic Chemical Vapor Deposition
… for the growth of high performance semiconductor laser structures. Experimental data have been collected on a variety of MOCVD grown laser structures and are presented along with device design criteria.
-
High-power semiconductor laser arrays by metalorganic chemical vapor deposition
Semiconductor injection lasers have the capability of producing very high output powers if a large array of diodes can be fabricated. The development of useful high power semiconductor lasers depends on fabrication processes which overcome the problems associated with high power laser operation. …
-
Modeling of DFB surface emitting lasers and semiconductor laser arrays
Theoretical modeling of novel semiconductor laser systems, i.e., distributed-feedback (DFB) surface emitting lasers and semiconductor laser arrays, is presented. The DFB surface emitting lasers can produce stable single-mode outputs even under high bit-rate direct modulation and form …
-
Non-Hermitian aspects of coherently coupled vertical cavity laser arrays
… 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 mechanics. The experimentally …
-
Coherent laser arrays from bottom-surface vertical-cavity surface-emitting lasers
Vertical-cavity surface-emitting lasers (VCSELs) are among the best choices for high beam quality semiconductor lasers. By designing a VCSEL array for uniform current injection and having the output coupler on the substrate side of the laser cavity, the laser will more easily operate in the …
-
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 …
-
Modulation of coherently coupled surface-emitting laser arrays: analysis and applications
Vertical-cavity surface-emitting lasers (VCSELs) have become the dominant source for optical data communication links in computer server, data center, and super computer applications. Driven by the exponential increase of performance in information technology, data centers, and computational power, …
-
Surface-emitting distributed feedback terahertz quantum-cascade phase-locked laser arrays
… from metal-metal waveguide quantum-cascade laser is proposed and implemented. Several surface-emitting distributed feedback terahertz lasers are coupled through the connection phase sectors between them. Through carefully choosing the length of phase sectors, each laser will be in-phase …
-
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 …
-
Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application
… coupled 2x1 vertical-cavity surface-emitting laser (VCSEL) arrays have been studied theoretically and experimentally. Directly modulated VCSELs are the dominant digital light source in short-haul data communication links due to their low cost and low operating power. Due to the demand for …
-
Indium Gallium Arsenide-Gallium Arsenide-Aluminum Gallium Arsenide Strained-Layer Lasers and Laser Arrays
… heterostructure strained-layer quantum well lasers are investigated in this work. The main implications of strain are examined briefly, including the importance of a critical layer thickness, strain-induced changes of the band structure, and their effects on laser performance. Experimental …
-
Stable and unstable resonators within Fabry-Pérot optical cavities containing microlenses: laser arrays, low-coherence imaging, and fractal laser modes
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
-
Thermal Management, Beam Control,and Packaging Designs For High Power
… managing and utilizing high power diode lasers are described. Low pressure water spray cooling for a high heat flux system is developed and proven to be an ideal cooling method for high power diode laser arrays. In order to enable better thermal and optical performance of diode laser …
-
Abstimmbare Halbleiterlaser und schmalbandige Laserarrays mit verteilter lateraler Rückkopplung
… wurden zwei verschiedene Typen von Halbleiterlasern mit verteilter Rückkopplung (DFB-Laser) entwickelt. Die Laser basieren auf Rippenwellenleitern und verfügen zusätzlich über ein dazu senkrecht orientiertes Metallgitter. Der evaneszente Teil der im Rippenwellenleiter geführten Lichtwelle …
-
Pulsed laser deposition of thick multilayer garnet crystal films for waveguide laser devices
… this project was to use the technique of pulsed laser deposition (PLD) to fabricate thick multilayered garnet crystal planar waveguides with rare-earth ion doped cores for use as planar waveguide laser devices. Planar waveguides are of interest because of the implications of their structure, …
-
Analysis of Fabry-Pérot laser resonators stabilized by microlenses and applications in speckle-free imaging
In this work, laser arrays comprising thousands of beams are experimentally demonstrated by stabilizing macroscopic Fabry-Pérot resonators with microlens arrays. The cavity parameters are tunable to either force fundamental-mode lasing across the array or to promote oscillation of various …
-
UV-written devices in rare-earth doped silica-on-silicon grown by FHD
… demonstration of an all-UV-written waveguide laser in silica-on-silicon. Low-loss operation (0.11-0.3 dBcm<sup>-1</sup>) of a 10mm long channel waveguide laser doped with 1.26wt% of neodymium was demonstrated with efficient lasing action (~ 33% slope efficiency). <br/><br/>Erbium, ytterbium …
Page 1 of 2