UNT Theses and Dissertations - 3 Matching Results

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Coherent Resonant Interaction and Harmonic Generation in Atomic Vapors

Description: This work examines the use of higher order multiphoton resonances in higher harmonic generation together with judicious exploitation of coherent interaction properties to achieve efficient harmonic generation. A detailed experimental study on third harmonic generation in two photon resonant coherent interaction and a theoretical study on four photon resonant coherent interaction have been conducted. Two photon resonant coheren propagation in lithium vapor (2S-4S and 2S-3D interaction) has been … more
Date: August 1987
Creator: Mukherjee, Nandini
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Dispersion of the Nonlinear Refractive Index of CS₂ in the Spectral Range of 9-11 μm

Description: The nonlinear refractive index (n2) of room temperature liquid CS2 in the wavelength range of 9 to 11 micrometers is measured. A line tunable hybrid C02 TEA laser and amplifier system is used for the experiments. In these measurements the well known photoacoustic method is utilized to observe the onset of whole beam self-focusing. The photoacoustic signal in a CS2 cell, much longer than the confocal parameter, is monitored. The departure of the acoustic signal from linear growth marks the criti… more
Date: May 1987
Creator: Mohebi, Mehrdad
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Two Photon Resonant Picosecond Pulse Propagation in Lithium Vapor

Description: The work of this dissertation has been to prove that the coherence of multiphoton excitation can be studied by an appropriately phased and time delayed sequence of pulses. An application of this fundamental study of coherence has been made for the enhancement of third harmonic generation. The coherent recovery of the energy lost to the two photon absorption process enalled a larger propagation distance for the fundamental than in an interaction which is incoherent or coherent, but not using a … more
Date: August 1987
Creator: Mukherjee, Anadi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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