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 8 of 8 for “"Mid Infrared Laser"”.
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High-Sn-content GeSn Alloy towards Room-temperature Mid Infrared Laser
… high Sn composition is highly desirable to cover mid-infrared wavelength. A systematic study of GeSn strain relaxation mechanism and its effects on Sn incorporation during the epitaxy via chemical vapor deposition was conducted. It was discovered that Sn incorporation into Ge lattice sites is …
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Development of a sensitive mid-infrared spectrometer for the study of cooled molecular ions
… relevant to many areas of scientific interest. Mid-infrared laser spectroscopy functions as a useful tool for understanding the role of molecular ions in these areas. To this end, a broadly tunable mid-infrared difference frequency generation noise-immune cavity-enhanced optical heterodyne …
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Exhaled breath analysis using laser absorption spectroscopy
… and therapeutic monitoring. For this thesis, laser spectroscopic techniques were employed to measure exhaled nitric oxide (NO), carbonyl sulfide (OCS) and carbon dioxide (CO2). A pulsed quantum cascade laser operating at 4.86 microns was coupled to a 36-m optical path length Herriott cell for …
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Harmonic and Supercontinuum Generation in Zinc-Blende Materials
Mid-infrared (MIR) laser sources have become an emerging research domain due to diverse applications in spectroscopy and strong field studies. Frequency conversion in nonlinear optical crystals is one of the promising techniques for generating the spectral coverage over one octave in the MIR. In …
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Near-infrared tunable diode laser absorption spectrometer for trace gas detection
A ground based near-infrared tunable diode laser absorption spectrometer (TDLAS), capable of measuring methane (CH₄) and nitrous oxide (N₂0) in their natural abundance's within the atmosphere, has been designed and constructed. The spectrometer has high resolution (0.0003 cm⁻¹), high precision …
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The molecular dynamics of hydrogen-bonding explored with broadband two dimensional infrared spectroscopy
… the last two decades, ultrafast multidimensional infrared spectroscopy has emerged as powerful technique for studying molecular dynamics in the condensed phase. By taking advantage of the complex relationship between a molecular oscillator's frequency and its environmental structure, we may …
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Physics of intraband quantum dot optoelectronic devices
… as sources and detectors of radiation in the mid- and far-infrared region of the spectrum. Much of a success has been obtained with quantum well based intraband devices, such as quantum cascade lasers and quantum well infrared photodetectors. However due to longer carrier lifetimes in quantum …
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Development of Multi-modal Optical Coherence Tomography Imaging Systems and Probes
… We combine the chemical specificity of mid-infrared spectroscopy with the morphological capabilities of OCT systems, potentially opening a new class of biomedical applications. First, we develop a swept-source OCT (SS-OCT) system that serves as a benchtop tool and a scalable platform for …