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1 October 1968 Mode Discrimination Of Optical Waveguides By Spatial Filtering
T. Sawatari, N. S. Kapany, J. J. Burke
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Proceedings Volume 0014, Fiber Optics I; (1968) https://doi.org/10.1117/12.965342
Event: Fiber Optics, 1968, Baltimore, United States
Abstract
In order to excite only a desired mode, it is sufficient to generate an electro-magnetic field whose transverse components on the end of the fiber match those of the mode. A technique which approximately satisfies this condition is suggested. The results of experiments which involve the use of spatial filtering techniques in the pupil of a launching lens are shown. A method for determining the relative power in each of several modes at the output end of a waveguide will also be presented. It is a vectorial spatial filtering technique, based on the orthogonality of the mode fields. Experimental results confirm the applicability of the method to the one case tested, that of a large diameter optical fiber of low numerical aperture.
© (1968) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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T. Sawatari, N. S. Kapany, and J. J. Burke "Mode Discrimination Of Optical Waveguides By Spatial Filtering", Proc. SPIE 0014, Fiber Optics I, (1 October 1968); https://doi.org/10.1117/12.965342
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KEYWORDS
Spatial filters
Optical filters
Waveguides
Diffraction
Image filtering
Photography
Magnetism
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