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.
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Showing 1 to 14 of 14 for “"laser cavities"”.
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Low threshold organic and quantum dot nanobeam lasers
Lasers in the visible spectrum have many applications including sensing, medical, and entertainment applications. Traditional semiconductors face challenges that limit their ability to create lasers for the visible spectrum. Organic materials and quantum (lots are an attractive alternative for …
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Investigation of Narrowband Acousto-Optic Tunable Filters for Semiconductor Laser Tuning
… tunable sources find applications in areas of laser surgery, optical coherence tomography, material processing, and differential absorption light detection and ranging. Acousto-optic tunable filters (AOTFs) are wavelength selective devices which allow for better stability than mechanical tuning …
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Explanation and prediction of curious experimental phenomena in lasers and nonlinear optics
… investigations of Raman shifting and the Co:MgF₂ laser, results were obtained which would not have been expected from the typical theoretical picture. In the case of Raman shifting, the forward Stokes conversion was found to depend upon the pump bandwidth. Numerical modeling suggests that coupling …
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The beam modes of general optical cavities
… model for the numerical study of semiconductor laser cavities.
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The development of components for ultrafast all-optical communication networks
… propagation is the distributed feedback (DFB) laser. A periodic index modulation, typically buried within the device structure (hence requiring an overgrowth step), is used to select the specific operating wavelength of the laser. As the WDM wavelength spacing continues to decrease, the …
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Parity-time and supersymmetry in optics
… method for achieving single mode operation in laser cavities. Other interesting phenomena also arise in connection with PT periodic structures. Along these lines, we introduce a new class of optical lattices, the so called mesh lattices. Such arrays provide an ideal platform for observing a …
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Inline microring reflector for photonic applications
… gates, sensors, switches, multiplexers, and laser cavities. The Bragg grating is a periodic structure that allows the selection of a narrow bandwidth of spectrum for stable lasing operation. In this dissertation, we study analysis and simulations of a compact microring based reflector …
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Long-wavelength gallium-indium-arsenide quantum wire lasers
… multiple quantum wire (MQWR) lasers grown on (100) on-axis InP substrates by a single-step MBE have been successfully fabricated and characterized. The QWRs were formed in situ in the (GaAs)$\sb2$/(InAs)$\sb{2.2}$ short-period-superlattice (SPS) layers by the strained-induced …
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Electronic structure and optical properties of sb-based self-assembled quantum dots for the mid-infrared range
… show significant advantages as active regions in laser cavities, both in term of lower threshold current densities and better thermal behaviour. The most studied system beingInAs/GaAs system but the antimonide-based (Sb-based) material system has been paid much attention due to their potential for …
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Development of intersubband terahertz lasers using multiple quantum well structures
… effort in developing intersubband THz lasers using multiple-quantum-well structures. Scarcity of compact solid state sources in this frequency range, and to demonstrate a novel unipolar laser technology, motivated this research. Transport studies for realizing THz intersubband …
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Fibre-based devices for next generation photonics communication systems
… grating devices for signal filtering and fibre laser applications have been realised. The concept of the superimposed fibre Bragg gratings has been extended to non-uniform grating structures and into Hi-Bi fibres to achieve highly useful grating devices such as overwritten phase-shifted fibre …
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Selective mode coupling in microring resonators for single mode semiconductor lasers
Single mode semiconductor laser diodes have many applications in optical communications, metrology and sensing. Edge-emitting single mode lasers commonly use distributed feedback structures, or narrowband reflectors such as distributed Bragg reflectors (DBRs) and sampled grating distributed Bragg …
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Designing subwavelength-structured light sources
The laser has long been established as the best possible optical source for fundamental studies and applications requiring high field intensity, single mode operation, a high degree of coherence, a narrow linewidth and short pulses. There are many applications that require lasers of varying …
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Nuclear Pumped Laser Coupling to Inertial Confinement Fusion
Made available in DSpace on 2017-07-06T18:49:05Z (GMT). No. of bitstreams: 2 Kruger_Anthony_W_MS.pdf: 42708784 bytes, checksum: fb6fe07ef843e51498701ff9462c234d (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1978