Abstract

A method for the measurement of the far-field power radiation pattern in axially symmetrical and nonsymmetrical single-mode optical fibers is proposed. The method, based on monitoring of the power passed through a variable-width slit in the far field, gives the power distribution as an associated Gauss–Laguerre expansion. The experimental setup permits the study of the power distribution and mode-field diameter dependence on the wavelength. Results for different types of single-mode optical fiber, including polarization-maintaining types, are presented.

© 1990 Optical Society of America

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