Abstract

It is demonstrated that light power may be converted from the guided LP01 mode to the radiative LP11 mode in single-mode optical fiber by using a periodic square-shaped distortion function. Coupling between these modes is measured directly as a function of distortion wavelengths and amplitudes for different optical wavelengths. The beating length between the modes (approximately 0.5 mm) becomes practical (1.5 mm and more) through the use of the higher harmonics of the distortion function.

© 1986 Optical Society of America

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