Thesis (Ph.D.)--McMaster University, 2004. / Advisor: D. T. Cassidy. Includes bibliographical references (p. 112-116). Also available online.

M.S. / Electrical Engineering / The efficient coupling between a semiconductor laser and a single-mode fiber is a key element for fully utilizing the single-mode fiber for the optical communication. In this thesis, the Gaussian beam approach is used for analyzing the coupling of a single-mode laser diode to a single-mode optical fiber by a microlens. Two analytical methods based on both the ABCD law and the diffraction theory are presented. The effect of a microlens on both the phase and amplitude of a Gaussian beam are discussed in detail. The presented analysis specifies the optimum coupling in terms of laser and fiber parameters and the laser to fiber distance. Furthermore, the coupling efficiencies achievable in hemispheric and etched conical microlenses systems are explicitly compared. The present analysis shows that a coupling efficiency as high as 62% is achievable with the optimal choice of laser and fiber parameters. Additionally, theoretically obtained coupling efficiency is compared with the experimental data for both butt and etched fibers.

M.S. / Electrical Engineering / Surface-emitting laser diodes are of interest for various applications such as monolithic two-dimensional arrays and optical interconnects for integrated optics. Therefore, it is essential to characterize these lasers. The farfield radiation pattern is one of the important characteristics of a laser diode. In this thesis the farfield of a surface-emitting laser diode with a turning mirror is modeled and measured. The computer simulation uses a rigorous theoretical expression for the field at the output mirror laser-air interface derived by Davies and Walpole and then using a modified form of the Kirchoff diffraction integral to generate the farfield. The computer modeling is done for both flat 45° and parabolic turning mirrors. Experimental data were also obtained for a surface-emitter with a 45° straight turning mirror. This mirror was fabricated using the focused ion beam micromachining technique developed at OGC. In the case of the parabolic turning mirror, the experimental results published by Liau and Walpole were used. A comparison of theoretical and experimental results for the two shapes of mirrors is also presented.

Thesis (Ph. D.)--Ohio State University, 2002. / Title from first page of PDF file. Document formatted into pages; contains xv, 145 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Betty Lisle Anderson, Dept. of Electrical Engineering. Includes bibliographical references (p. 140-145).

Thesis (M. Phil.)--University of Hong Kong, 2002. / Includes bibliographical references.

Not available / text

Not available / text

published_or_final_version / Electrical and Electronic Engineering / Master / Master of Philosophy

Thesis (M.S.)--Oregon Graduate Center, 1988.

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