Chen, Mengyu. / Thesis Ph.D. Chinese University of Hong Kong 2015. / Includes bibliographical references (leaves 147-161). / Abstracts also in Chinese. / Title from PDF title page (viewed on 26, October, 2016).

Fourier techniques have recently become popular for the description of underwater image transmission. Two properties necessary for the application of Fourier techniques to any system are those of linearity and invariance. This work describes a laboratory investigation of these properties for a variety of aqueous media. The hypothesis is found to be applicable in some cases and not in others; the principal difficulty is that of time stationarity. / Graduation date: 1972

Thesis (M.E.E.)--University of Delaware, 2006. / Principal faculty advisor: Dennis W. Prather, Dept. of Electrical and Computer Engineering. Includes bibliographical references.

A method for improving the accuracy of the optical diffusion theory for a multi-layer scattering medium is presented. An infinitesimally narrow incident light beam is replaced by multiple isotropic point sources of different strengths that are placed in the scattering medium along the incident beam. The multiple sources are then used to develop a multi-layer diffusion theory. Diffuse reflectance is then computed using the multi-layer diffusion theory and compared with accurate data computed by the Monte Carlo method. This multi-source method is found to be significantly more accurate than the previous single-source method. The appendix to this thesis also shows the derivation of the extrapolated boundary condition. This boundary condition is utilized to solve for the discontinuity that occurs at the tissue-ambient medium interface. The boundary conditions for common index of refraction mismatches are solved for and listed in a table.

This research investigated the spectra of two different semiconductor lasers subjected to optical feedback. For the vertical -cavity surface-emitting laser (VCSEL),a wavelength selective element (Etalon) was used to feedback one of the transverse modes into the laser cavity. The experimental results showed that the multi-transverse modes could be suppressed to yield the fundamental mode output or a higher-order transverse mode output, in which the side-mode suppression ratio (SMSR) where 14.8 dB and 6.4 dB respectively. For the external cavity AR-coated laser, we studied the feasibility of generating mode-locking pulses by the temporal modulation of orthogonal-polarization optical feedback (OPF). The RF spectrum analyzer was employed to analyze the interaction. The observation clearly presented the spectra of mode- locking-like pulses in the laser¡¦s output.

Thesis (Ph. D.)--University of Queensland, 2002. / Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago 1911. / Published as whole number 85 of the Psychological monographs.

Thesis (Ph. D.)--University of Texas at Austin, 2003. / Supervisor: Ray T. Chen. Vita. Includes bibliographical references. Available also from UMI Company.

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 151-162).

Not available / text