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Showing 1 to 18 of 18 for “"laser mode"”.
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Advances in semiconductor laser mode and beam engineering
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Semiconductor laser mode engineering via waveguide index structuring
Semiconductor laser diodes are used in many applications, and their performance is often strongly influenced by the optical mode properties. In this work, dielectric waveguides and their guided modes have been simulated and analyzed as relevant to semiconductor diode lasers. The transverse …
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Development and application of saturable absorbers to femtosecond solid-state laser mode-locking
… stability and reliability of ultrashort pulse lasers, making them more useful in many applications. These versatile devices can be grown both epitaxially with molecular beam epitaxy and non-epitaxially using RF sputtering. In this thesis, the development and application of both types of …
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Development and spatio-spectral mapping of a capillary high harmonic source
… contributions made to the field are: A novel laser mode quality measuring device. (Laser mode quality strongly affects the efficiency of the capillary launch). A study of the spectral output of the system as a function of gas pressure, laser power, and laser spectral phase. An analysis …
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Microbiological Study of Bacterial Load Reduction in the Root Canal System Utilizing a Novel ErYagLaser
… to evaluate the effectiveness of a novel Er:Yag laser-activated irrigation technique in reducing bacterial load in root canals. In this study, mandibular molars are prepared and cultured with Enterococcus faecalis, and experiment was perform to test whether laser-activated irrigation could …
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Frequency stability of a helium neon laser system with external cavity control
Many applications of gas lasers depend upon the extremely high spectral purity of their output signals. To fully exploit this remarkable spectral purity requires a high degree of frequency stabilization and laser mode control. In the past few years much effort has been expended in attempts to …
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LASER DIODE PUMPED ND: YAG SOLID STATE LASER FOR APPLICATIONS IN SECOND HARMONIC GENERATION
… this thesis, a new pumping approach for the YAG laser pumped by laser diode is proposed to achieve high energy/power performances. In this approach, the central part of the pump beam from the laser diode is absorbed directly by the YAG rod through its convex end surface, which is very much like …
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Development of Optoelectronic Devices and Computational Tools for the Production and Manipulation of Heavy Rydberg Systems
… optical spectrum analyzer for displaying laser mode structure in real time. Utilizing programmable microcontrollers to read data from a CMOS image sensor illuminated by the diffraction pattern from a Fabry-Perot interferometer, this device can operate with beam powers as low as 3.3 …
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Toward single-cycle optical pulses
… required. Firstly, two very stable and broadband mode-locked lasers with overlapping spectra are necessary. Secondly, a tight timing synchronization with timing jitter under one-tenth of the synthesized pulsewidth has to be implemented. Finally, the carrier-envelope offset frequency lock between …
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Pivot point independent, external cavity tunable laser
… a novel pivot point free external cavity tunable laser (PPI ECTL). Existing external cavity tunable lasers are constructed using tunable optics, such as Bragg gratings to manipulate the cavity length. These elements although functional provide instability with prolonged use as they are defined by …
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Femtosecond fiber lasers at 1550 nm for high repetition rates and low timing jitter
Femtosecond fiber lasers have become an important enabling technology for advances in many areas including: frequency combs, precise timing distribution, optical arbitrary waveform generation, and high bit rate sampling for analog to digital conversion. Experiments and applications like these put …
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Multi-Watt, diode-pumped planar waveguide lasers
… towards diode-bar pumped crystal waveguide lasers with a high-power, high-quality output. <br/><br/>It is shown that in order to accommodate the highly divergent, non-diffraction limited output from a diode-bar pump source, a waveguide with a relatively large numerical aperture (NA) is …
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Non-Hermitian Whispering Gallery Mode Optical Microresonators and Their Applications
<p>Whispering-gallery-mode (WGM) optical microresonators, in which light propagates along the circular rims due to the total internal reflection, have attracted broad attention in the past two decades. Owing to the ultrahigh quality factor and the small mode volume, WGM resonators can significantly …
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Raman and fluorescence spectra of azabenzenes
… Raman intensity of the ��<sub>10a</sub> mode relative to the intensity of the ��<sub>4</sub> mode was measured for six exciting lines whose frequencies varied from 50% to 80% of the <sup>1</sup>B<sub>3u</sub> transition energy. The pyrazine was in the liquid state at 65°C for this …
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Investigation of intracavity phase interferometry applied to nano-metrology
… to be measured is put as integral part of a mode-locked laser. It relies on the fact that any intracavity phase shift of an intracavity pulse will result in a frequency change of the whole pulse train. The implementations of IPI requires the operation of a mode-locked laser in which two …
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Design and investigation of the emission dynamics of a mode-locked SBS-laser oscillator
… primary objective of this work was to develop a laser source for fundamental investigations in the field of laser – materials interactions. In particular it is supposed to facilitate the study of the influence of the temporal energy distribution such as the interaction between adjacent pulses on …
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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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TIME DOMAIN CHARACTERIZATION OF MONOLITHIC QUANTUM DOT PASSIVELY MODE-LOCKED LASERS
Passively mode-locked lasers based on InAs/GaAs quantum dots have benefited from the unique properties pertaining to this material system, leading to the demonstration of wide mode-locking operational maps, and reconfigurable repetition rates, as well as low rms timing jitter. Applications of these …