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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"laser array"”.
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Design and simulation of a highly discriminant laser array waveguide
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Development of optical fiber laser array method for assessing quality of chip packages
… focuses on the development of an improved laser ultrasonic inspection system for quality evaluation of microelectronic packages of all sizes. This new system uses an optical fiber array consisting of two optical fiber probes, instead of the single fiber probe used in the original inspection …
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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
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Surface -Etched Distributed Bragg Reflector Lasers in Photonic Integrated Circuits
A high-power DBR laser array is also presented for use in spectral beam combining systems. The laser structure for this application is engineered for high-power applications. The engineering of the lateral optical guiding structure as well as the surface-etched grating is discussed.
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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 …
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Distributed Feedback Ridge Waveguide and Step-Graded Separate Confinement Quantum Well Heterostructure Lasers Grown by Metalorganic Chemical Vapor Deposition
… confinement quantum well heterostructure lasers, and the development of novel strained-layer distributed feedback ridge waveguide (DFB RW) quantum well laser and laser array are presented in this work.
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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 …
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Markov-Airy method for electromagnetic fields in layered structures and microsphere-stabilized planar resonators
… observed data. By self-assembling spheres, a laser array is demonstrated.
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Micro laser personal projector
… research will describe some ways of steering laser beams in one dimension to produce up to a one-meter wide screen. A one dimensional micro laser array will be used to avoid the effect of flickering while projecting an image. The use of a single lens to focus all lasers will save the …
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Temperature and Spatial Hole Burning Effects in Semiconductor Lasers and Integrated Optical Devices
… are investigated in long-wavelength InP-based lasers and integrated optical devices, including Fabry-Perot (FP) lasers, distributed-feedback (DFB) lasers, and integrated electroabsorption modulator with DFB lasers (EML). First, the temperature dependence of bulk InGaAsP semiconductor laser …
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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 …
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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, …
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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 …
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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 …
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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 …
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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 …
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From high power terahertz quantum cascade lasers to terahertz light amplifiers
… The invention of the THz quantum cascade laser, a electronically-pumped semiconductor heterostructure which emits photons from electronic intersubband transitions, provides the first solidstate fundamental oscillator at the frequency range from 1.2 to 5.1 THz. Due to the subwavelength …