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Generation of tunable femtosecond laser pulses and the construction of an ultrafast pump-probe spectrometerMorrison, Vance. January 2008 (has links)
An ultrafast UV-visible spectrometer was designed and implemented. An optical parametric amplifier was constructed to be used as a pump source for the spectrometer. Using nonlinear optical processes and an 800 nm ultrashort pulses, tunable infrared(IR) light was produced with a wavelength range of ∼.1 mum to 3 mum. The IR light was then mixed with 800 nm light to produce tunable visible light with a wavelength range of 466 nm to 600 nm. Supercontinuum (SC) was used as the probe pulse of the spectrometer, providing a large observation bandwidth. Commercially purchased fast spectrometers were used as the detection mechanism. The characterization of the set up, as well the observation of some ultrafast molecular dynamics observed in 8-hydroxy-1,3,6-pyrenetrisulfonic acid, are presented.
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Plasma waveguides for high-intensity laser pulsesSpence, David James January 2001 (has links)
This thesis documents the development of plasma waveguides for high-intensity laser pulses. Initial work concentrated on the development of the discharge-ablated capillary waveguide, based on the work of A. Zigler (Zigler, A., Y. Ehrlich, C. Cohen, J. Krall and P. Sprangle, J. Opt. Soc. Am. B 13, 68). The waveguide was shown to be capable of guiding picosecond laser pulses with an intensity of 10<sup>16</sup> W cm<sup>-2</sup> over a length of 10 mm. The pulse energy transmission of the capillary was increased from 48% to 70% when the discharge was fired. An interferometry-based measurement technique was developed, allowing measurement of the electron density profile formed in the capillary waveguide. These measurements were used as input to a numerical simulation that predicted the propagation of intense laser pulses through partially-ionised plasma waveguides. Numerical simulations accurately reproduced the picosecond pulse guiding results, and gave important insights into the properties and severe drawbacks of partially-ionised waveguides. Previous work on partially-ionised plasma waveguides has not fully explored the implications of the propagation of intense pulses through the partially-ionised plasma. For polypropylene waveguides, it was shown that for pulses with an intensity of 10<sup>16</sup> W cm<sup>-2</sup>, the waveguide is not capable of high-quality guiding. However, for pulses with an intensity of greater than 10<sup>17</sup> W cm<sup>-2</sup>, high-quality guiding is predicted through the partially-ionised waveguide in a new regime called "quasi-matched guiding". A novel gas-filled capillary discharge waveguide was designed and built. The device was shown to form a guiding channel inside a capillary pre-filled with gas. Interferometry measurements of the electron density profile formed in a hydrogen-filled capillary discharge waveguide showed that an approximately parabolic plasma waveguide could be formed in an essentially fully-ionised hydrogen plasma. The device was used to guide femtosecond laser pulses, with an intensity of 10<sup>17</sup> W cm<sup>-2</sup>, over distances of 20 and 40 mm, with a pulse energy transmission of 92% and 82% respectively. For the 20 mm-long waveguide, the peak intensity in the output plane of the waveguide was 70% of that at the waveguide input. These results indicate the lowest coupling and insertion losses of any waveguide published to date. The gas-filled capillary discharge waveguide is shown to be capable and versatile, and is suited for use as a tool in other applications. The use of the waveguide in the fields of XUV lasers and laser wakefield acceleration is discussed.
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Femtosecond laser microprocessing of aluminum films and quartzDoerr, David W. January 1900 (has links)
Thesis (Ph.D.)--University of Nebraska-Lincoln, 2007. / Title from title screen (site viewed Dec. 4, 2007). PDF text: xii, 80 p. : ill. ; 6 Mb. UMI publication number: AAT 3273191. Includes bibliographical references. Also available in microfilm and microfiche formats.
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Molecular imaging using femtosecond laser pulsesDooley, Patrick W. Corkum, Paul B. January 2003 (has links)
Thesis (Ph.D.)--McMaster University, 2004. / Supervisor: Paul B. Corkum. Includes bibliographical references.
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Enhanced hot electron confinement and isochoric heating in high contrast ultra-intense laser produced plasmas via novel conical micro-target designRassuchine, Jennifer Melissa. January 2007 (has links)
Thesis (Ph. D.)--University of Nevada, Reno, 2007. / "December, 2007." Includes bibliographical references (leaves 244-254). Online version available on the World Wide Web.
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Femtosecond Cr⁴⁺:forsterite laser for applications in telecommunications and biophotonics /McWilliam, Alan. January 2007 (has links)
Thesis (Ph.D.) - University of St Andrews, March 2007.
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Versatile high resolution dispersion measurements in semiconductor photonic nanostructures using ultrashort pulses /Bell, Matthew Richard. January 2007 (has links)
Thesis (Ph.D.) - University of St Andrews, May 2007.
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Optical micromanipulation using ultrashort pulsed laser sources /Little, Helen. January 2007 (has links)
Thesis (Ph.D.) - University of St Andrews, May 2007.
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Ultrashort-pulse generation from quantum-dot semiconductor diode lasers /Cataluna, Maria Ana. January 2007 (has links)
Thesis (Ph.D.) - University of St Andrews, December 2007.
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A UV preionized TEA CO₂ laser amplifier Master's project /Miller, Marshall. Bach, David Rudolph. January 1900 (has links)
Thesis (M.S.)--University of Michigan, (1977?).
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