August 1988

Document Type


Degree Name



Dept. of Electrical Engineering


Oregon Graduate Center


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.





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