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Proceedings Paper

Mode Discrimination Of Optical Waveguides By Spatial Filtering
Author(s): T. Sawatari; N. S. Kapany; J. J. Burke
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Paper 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.

Paper Details

Date Published: 1 October 1968
PDF: 9 pages
Proc. SPIE 0014, Fiber Optics I, (1 October 1968); doi: 10.1117/12.965342
Show Author Affiliations
T. Sawatari, Optics Technology, Inc. (United States)
N. S. Kapany, Optics Technology, Inc. (United States)
J. J. Burke, Optics Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 0014:
Fiber Optics I

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