Experimental verification of grating theory for surface-emitting structures

Raj Ayekavadi; C. S. Yeh; Jerome K. Butler; Gary A. Evans; Paul J. Stabile; Arye Rosen

doi:10.1117/12.43795

1 July 1991 Experimental verification of grating theory for surface-emitting structures

Raj Ayekavadi, C. S. Yeh, Jerome K. Butler, Gary A. Evans, Paul J. Stabile, Arye Rosen

Proceedings Volume 1418, Laser Diode Technology and Applications III; (1991) https://doi.org/10.1117/12.43795
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

The design procedures for the construction of corrugated waveguides of Al2O3 and the far field radiation patterns observed from such waveguides are presented. The design procedure is based on the physics of four layer waveguide structures. The corrugated waveguide is similar to a Bragg type diffraction grating. This corrugated structure provides 90 degree(s) reflections at certain specific wavelengths depending on the grating spacing. A particular advantage of such structures that behave like grating antennas is that their radiation pattern can be scanned electronically by changing the wavelength (frequency). This corresponds to changing the propagation constant of the propagating wave. The far field radiation pattern obtained from the experimental set up is compared against simulations carried out using the Huygen-Fresnel theory and a close agreement is seen between theoretical prediction and experimental observation. Specifically, the design and the measurements are made in the frequency range from 90 GHz to 100 GHz for a number of different kinds of structures including those with one as well as multiple sections of corrugations.

Citation Download Citation

Raj Ayekavadi, C. S. Yeh, Jerome K. Butler, Gary A. Evans, Paul J. Stabile, and Arye Rosen "Experimental verification of grating theory for surface-emitting structures", Proc. SPIE 1418, Laser Diode Technology and Applications III, (1 July 1991); https://doi.org/10.1117/12.43795

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